Hotaru

is the granddaughter of the former leader of the Tsuchigumo clan, En no Gyōja.

Six-Tailed Beast arc
Sometime before the start of the arc, Hotaru was under attack by a group of ninja who were actually after Utakata. Utakata saves Hotaru from the ninja, but was wounded in the battle. Hotaru ran for help from her village, saving Utakata's life, causing him to become indebted to her. After this, he became a sort of master to Hotaru in order to hide from anyone who is after him. When a group ninja came looking for the Tsuchigumo clan's kinjutsu, Tonbei had Hotaru, along with Utakata, take the clan's forbidden jutsu so that ninja could not retrieve it. While traveling, Utakata got upset at Hotaru for calling him, at which point Naruto arrived, believing Utakata to be attacking Hotaru. Hotaru broke up the fight and Utakata left her, deciding that Team 7 would be capable in protect her. As she watched him float away in a bubble, she tried to convince him not to leave, but was unsuccessful in doing so. after Utakata left Hotaru we find him sleeping under a tree having a flash back of why he gets angry when Hotaru calls him master, saying that the relationship between a master and a student is not somthing you can count on. Utakata reluctantly begins to teach her the Water Walking Exercise first, believing that she wouldn't master it. In the morning, she shows that she was able to stand on top of the water by training all night. Next, Utakata teaches her Water Style: Violent Water Wave, once again believing that she would not be able to master it without water-natured chakra. She again masters the jutsu.During the flashback we see Utakata chained on a rock and it looks like a seal on the ground aroud him and Utakata is protesting against his supposed master. Saying nothing, his master placed his hand into the seal of the 6 tails. Later, he comes across the ninja that were attacking the village and that were looking for the forbidden jutsu of the Tsuchigumo clan. The group of bandits trapped him in an unknown barrier jutsu a few meters away from Hotaru and Naruto. She tries to convince Naruto to leave her alone and at first, Naruto argues with her only for Yamato to devise a plan to convince Hotaru to accept their protection. Using his unique jutsu, Sai drew mountain leeches to fall on Hotaru, who freaks out and becomes afraid, causing her to accept Team 7's protection. When they reached the village, Team 7 leaves Hotaru with the Tsuchigumo clan and Hotaru thanks Naruto before he leaves.

Trivia

 * means firefly.
 * Hotaru and Shibuki shares similiar traits
 * Both have displayed a talent for Water Style jutsu
 * Both are easily surprised