A (Fourth Raikage)

The current Raikage is the leader of Kumogakure. He is also the older brother of the Jinchūriki of the Eight-Tailed Beast, Killer Bee. It is hinted that Killer Bee, and therefore the Raikage as well, comes from the Yotsuki clan. Knowing Yugito Nii's and Killer Bee's immense powers if they were to ever transform into their full power forms, he forbade them from doing so.

Personality
He is very caring and protective towards his brother, despite Killer Bee's status as a Jinchūriki, and cried at the idea of his younger brother being captured by Akatsuki. He is also headstrong and easily excited, busting through a palace wall (probably from inside his own office, too) to attend the kage's summit; his assistant implies that this isn't the first time, implying that he is quite destructive while in this mental state.

Pain Invasion arc
After learning that Killer Bee is captured by Akatsuki he smashes his desk out of sheer rage. He is later seen musing over how it is possible for Killer Bee to be defeated. He consults his secretary who, after he says he has heard that the culprit was Sasuke Uchiha, informs him that Sasuke has left the village a long time ago. The Raikage then complains about why the Hokage has not dealt with it, comparing to how fast they dealt with the Hyuga.

He is later shocked to learn that they had lost contact with one of his men, Jei, and orders for them to find the location of Akatsuki even if it required an entire battalion. He then orders for Samui's team to go and inform Konoha, that they will deal with Sasuke and demands a meeting of the five Kage to finally deal with Akatsuki once and for all.

When Samui's team arrives, the Raikage gives them the message for the Hokage and later stops the bickering between two of them. He then proclaims, while crying, that they will save Bee no matter what.

Five Kage Summit arc
When he receives word that Samui's team has yet to answer, but they know the way to the meeting and that he would most likely meet them on the way or receive a message from them on the way, he orders his two bodyguards, Darui and Shī, to head out and bursts through the window of his office.

Abilities
He is physically very strong, as he first appears lifting a large amount of weight with just one hand and broke his desk with a single punch. Killer Bee also mentioned in the fight with Sasuke that before him, only the Raikage was able to deflect the Eight-Tails.