Hyakunosuke Ogata

Ogata is the former Superior Private of the 7th Division and a member of Hijikata's Group. Loyal only to himself, Ogata is pursuing the gold for his own reason, unknown to anyone.

Ogata is analytical and coldblooded, a proud sniper who is used to examining things from afar and evaluating circumstances in order to best take advantage of them. Even when at a disadvantage, he keeps his nerve and takes the most efficient course of action. He is also known for his marksmanship, a skill he honed since his childhood. He is ruthless and doesn't hesitate to kill, although he is aware that wanton slaughter is counterproductive, and would rather escape a fight he can't win than throw himself into it impulsively.

On the surface, Ogata is capable of acting amiable and polite; in order to achieve his goals, he can lie and deceive others. He is prone to caustic remarks and may openly look down on some people. Ogata also likes to snark about any perceived absurdity and incompetence, especially if it comes to warfare and keeping one's gun safe. Although he is generally emotionless and indifferent to others, Ogata seems to be a very proud man who doesn't like to be doubted. If challenged, he would attempt to do a task that someone says would be difficult for him. He has a habit of slicking his hair back, as well as exhaling through his nose when praised.

(Source: Golden Kamuy Wiki)