Sai

is a fictional character in the anime and manga series Naruto.

Background
One of many nameless orphans recruited into Konoha's secret branch of the ANBU, Root, Sai was raised and conditioned to have no personality or personal connections. The name "Sai" is given to him for the purposes of joining Team 7. His actual name is currently unknown, possibly even to himself. Sai was recruited as the newest member of Team Kakashi by Danzo, the commander of Root, to join Naruto Uzumaki and Sakura Haruno as a replacement for Sasuke Uchiha after his defection of konoha.

During his time among Root, Sai met Shin, an older member of the same organization who took a liking to Sai's drawing ability, and Sai came to think of him as a older brother and looked up to him. Eventually, his "brother" died of an unnamed illness, and Sai's Root training suppressed most of the memories he had for his brother. Before the death of his brother, he was making a book that would show the feelings they shared for each other and all the opponents they faced. Their pictures would start at opposite ends of the book and in the middle both him and his brother would be holding hands, but his brother died before he could give it to him.

Personality
When first introduced Sai was distinguished by total lack of emotion which he often masked behind a false cheerful if rather blunt facade. Through numerous mental conditioning by Root he'd had almost all his emotions suppressed, making it easier for him to accomplish dangerous, unpleasant, or unethical missions; with his only loyalty being to whoever commanded him. He particularly had trouble understanding how personal bonds can drive others and had no initiative of his own, show by his confusion over why Naruto would go so far to save Sasuke even though he had not been ordered to do so.

His ability to stay focused on the mission at hand also seems to allow him to have more attention to detail, allowing him to notice if something is not as it appears or should be, shown from how he easily saw though Yamato's tricks.

Sai is a talented artist, but his lack of feelings prevented him from ever titling his work. His lack of social skills and obviously false outer mask frequently caused conflict between Sai and Team Kakashi, as he makes the mistake of insulting the other members in an attempt to seem sociable. He tries to seem more compassionate by smiling, though his teammates come to dislike it due to his obvious insincerity.

After spending more time with his team, Sai comes to appreciate bonds, particularly the bond that exists between Naruto Uzumaki and Sasuke Uchiha. Sai began to break out of his emotionless shell and started to remember the ties he had had with his own "brother". In doing so, Sai was able to start giving genuine smiles. Wanting to experience personal bonds for himself, Sai sets out to make as many friends as he can. However, since he is learning most of this out of books and by trial and error, he once again often accidentally ends up offending people. In doing so he has come to develop his own more pleasant and thoughtful personality, showing signs of enthusiasm, even nervousness, being friendly towards others, helping them when they need it, referring to them kindly, and having fun in social situations.

Abilities
Sai first and most notable talent is his great skill as an artist, and claims to have drawn thousands of pictures. Despite the magnitude of things he has drawn, he has never given one of his works a name, his lack of emotion making it impossible for him to form a significant attachment to his work to give it a title. Sai's drawing ability is also the source of his jutsu, known as. By drawing objects with a brush on his scroll he is able to bring his creations to life by animating the ink directly off the page. This increases their size and allows them to move and attack opponents at a distance. Of his seen creations he uses giant birds for long range transport, lion-like monsters for attack, small rats for scouting and numerous small serpents to capture a target. Because this jutsu requires an actual picture to bring to life, Sai has shown capable of drawing sketches at alarmingly fast speeds. Likewise, by creating an of himself, he can perform a reconnaissance of an area without actually endangering himself. Sai can also transform words he writes on his scroll into small animals that seek out their target and revert back to words upon arrival, giving Sai a way to communicate easily over long distances. Also, as seen when he fought Naruto, he appears to be able to transport himself across short distances by surrounding himself in ink and making the same hand seal that he uses in his Super Beast Imitaion Picture. Sai has also shown the ability to make items out of ink, like when he made an umbrella for Sakura to stay dry under.

In addition to his art-based ninjutsu, Sai has also shown himself to be a capable battler, being able to effectively counter an opponent's attack as seen from how effectively he blocked Sasuke's attempted kill on Naruto and from how he subdued Kabuto.

Sasuke and Sai arc
Sai was assigned to join Team Yamato by his superior Danzo, and first introduced himself to Naruto by attacking him. After later meeting Sakura and temporary Team Kakashi leader Yamato, the group set out to meet a spy of Sasori who had infiltrated Orochimaru's ranks. Soon after leaving Konoha, Sai began to bad-mouth Sasuke Uchiha, earning him a punch from Sakura. Sai's standing with the team didn't improve as their trip continued, as he often insulted Naruto's manhood. When Naruto defended Sasuke, Sai wondered why someone would protect a "traitor" to which Naruto said he's not a traitor, but a friend. This concept was lost to Sai, who seemed to have no friends, and when asked if he even knew what friend meant, he showed a scroll with the word written on it.

Upon reaching the designated meeting place, Yamato went ahead disguised as Sasori so that he could meet the spy. When the spy, Kabuto Yakushi, arrived with Orochimaru to kill Sasori, Sai, Naruto, and Sakura were called in for help. Soon after, Naruto and Orochimaru did battle, signaling the start of Sai's real mission. After leaving Yamato's side and deciding not to to save Sakura from falling off of a cliff, Sai watched Naruto and Orochimaru's fight from the cover of the neighboring trees. When Orochimaru eventually repelled Naruto, Sai approached him with a proposition from Danzo. Orochimaru accepted, and Sai accompanied him and Kabuto back to their hideout.

Along the way, Kabuto created a Sai lookalike and left it behind to throw off anyone who may be following them. Once arriving at Orochimaru's hideout, Sai was introduced to Sasuke, who had been training under Orochimaru for the past two and a half years. Sasuke seemed indifferent to him, expressing discontent towards Orochimaru instead. When Sai mentioned that he might get along better with Sasuke than he did with Naruto, Sasuke fixed him with a stare, startling Sai due to the amount of fear it gave to his emotionless self.

After his meeting with Sasuke, Sai was lead to his own room by Kabuto, who locked Sai in when he left. Soon after arriving in the room, Team 7, having put extra precautions into following Sai, arrived and confronted Sai about his defection to Orochimaru. Because he had been caught, Sai divulged the information about his true mission: to ally with Orochimaru on Danzo's behalf so that the two may join forces in destroying Konohagakure. Disgusted by the ramifications of this plan, Team 7 took Sai from Orochimaru's lair and restrained him. With Sai out of the way, Team 7 prepared to go looking for Sasuke, hoping to bring him back to Konoha. Sai, however, doubted their success, stating that Sasuke no longer cared about them. Naruto, in response, stated that he used to hate Sasuke, but over time he had formed a bond with Sasuke through their shared experiences, and as such he would do whatever it took to bring Sasuke home. Naruto's dedication to retrieving Sasuke struck a chord with Sai, who was left without words as a result.

Just as Team 7 was about to leave Sai, Kabuto arrived and released him, hoping that the two would be able to defeat Naruto, Sakura, and Yamato easier as a team. Before any fighting can begin, however, Sai, moved by Naruto's words and hoping to understand the concept of "bonds" better, helped Yamato immobilize Kabuto. After extracting some information from Kabuto, Naruto and Sai broke away from the rest of Team 7 to find Sasuke. While they rest, Sai remarked how Naruto reminded him of his older brother, bringing an actual smile to his face as a result of his brother's memory.

Sai's happiness was short-lived, as Orochimaru soon arrived in an attempt to see where Sai's loyalties really lie. With Naruto's encouragement, Sai left the scene with the assignment to find Sasuke ringing in his ears. As Sai searched the numerous rooms of Orochimaru's lair, Naruto was rejoined by Sakura and Yamato, forcing Orochimaru to retreat. As Yamato went through the belongings Sai left behind, he found a bingo book that had Sasuke listed as a target, indicating that Sai's actual mission has, from the very start, been to kill Sasuke.

As Team 7 split up again to catch Sai and stop him from accomplishing his mission, Sai finally found Sasuke asleep in his room. Sasuke, however, was quick to notice Sai's presence and asked what he wanted. Sai responded by saying that he was going to bring Sasuke back to Naruto instead of carrying out his mission, willing to fight to protect the bond that Naruto would give his life to defend. Angered that Sai woke him up for a discussion about bonds, Sasuke attacked Sai, destroying the room and caused a large crater to be left in its place. Team 7, attracted to the scene of the attack, confronted Sai about his actual motives. Upon learning of what Sai was trying to do, Sai was welcomed back into the ranks of Team 7, and the group joined together in an attempt to defeat Sasuke.

As the group surrounded and attacked Sasuke, Sai's attack was the only one that manages to be effective. After Sai was congratulated by Sasuke for this feat, the latter used his Chidori Current to throw the group back. Uninterested in having a drawn out fight, Sasuke prepared to finish the group with a single attack—Kirin—, though before he could do so Orochimaru and a freed Kabuto arrive to stop him, and the three disappeared. Team 7, having failed their mission, returned to Konoha. After, however, Sai drew a picture of him and Team 7, with the scroll he had shown earlier next to it with the word "Friends."

Team 10 sub-arc
As Team 7 recuperated, Sai used his spare time to read up on relationship skills and gaining people's trust at the Konoha library. As one could expect from someone who learned to communicate with others via a book, Sai initially had problems putting what he read into practice, but Naruto told him not to worry about being formal. During Team 7's dinner with the members of Team 10, Sai put what he's learned into practice, though found little success.

Sai later came to Team 10's aid in their fight against Akatsuki members Hidan and Kakuzu. Because Shikamaru Nara was separated from the rest of the group, Sai and Sakura were sent as backup for him, though upon arrival they found that Shikamaru had already defeated his opponent. Sai returned with everyone else to Konoha, having not taken part in the battle.

Hunt for Uchiha arc
After returning home, Naruto, Sai, and Sakura went eat ramen. Naruto had trouble eating his food because his right hand was broken, Sai ended up interrupting a tender moment between Naruto and Sakura by stuffing Naruto's face with noodles because he read in a textbook that he should help his friends. While usually true, Naruto went off on him for ruining the moment. Sai, along with the rest of Team Yamato joined Kakashi's 8-Man Squad in their search for Itachi Uchiha, and later Sasuke Uchiha.

Jiraiya's Death
Sai was present along with Team Kakashi and Tsunade when Jiraiya's death was revealed to Naruto.