Misaki Oga

is Tatsumi Oga's older sister. She was the first head and founder of the group Red Tail.

Appearance
She has shoulder length brown hair with her bangs in the middle and brown eyes. She is usually seen with her orange tank top and blue shorts. She is also well endowed.

Personality
While more even-tempered than her younger brother, Misaki is still rather fearsome when angry (to the degree where even Oga will only pick a fight with her up to a certain point). Like her parents, she quickly accepts Hilda and Beelzebub IV as part of the family, and will not hesitate to criticize or physically punish Oga if she sees him slacking off as a parent. She seem to have a good relationship with Hilda and gets mad whenever Oga does something to make her upset.

History
Misaki Oga was the founder and leader of Red Tail.

Because of her status as a Red Tail leader it is possible that she was one of Ishiyama's leaders during her time.

Return to Ishiyama High School Arc
On a snowy day, Misaki opens the front door to find a "motley crew" waiting to see her younger brother. She happily greets Aoi and Furuichi while she lets them and two others in. She states that she does not recognize the "guy with the lip chain" which incites the delinquent to mock her; for his insolence, Misaki smashes his head in through the front door. Misaki quickly asks Aoi about the Red Tail while she enters her house and is pleased that the gang is doing well. She then takes her guests to Oga's room, noting that he has been busy since the previous night. When the five people enter his bedroom, they see Oga playing a card game with Baby Beel, which bothers Misaki somewhat.

Quotes

 * "TATSUMI-!!" (whenever she's berating Oga, usually followed by a kick or a punch)
 * "Hilda-chan, will you go get that for me?"
 * "I was just thinking of having [Hilda] go buy some soy sauce..."
 * "Tatsumi! Go and escort this girl back home!" (referring to Aoi)
 * "No matter where you look, you're not going to find a bride (Hilda) like that again!"
 * "You did something stupid and hurt her (Hilda's) feelings, right?! GO AND APOLOGIZE!!"
 * "Until you find and bring her (Hilda) back, you're not getting into this house again!"
 * "You're Beelze's mother. You see that little loser of a brother I have there? I can't believe someone as good as you would be with him, but you're his wife." (to Hilda)
 * "Her boobs are huge?"

Trivia

 * She seems to be fond of ice popsicles, as she's often seen eating one when she appears.
 * Oga once commented on how easily his sister could "boss that demon around".
 * Oga states that the manner how Suiten Ikaruga becomes violent while drunk is similar to how Misaki can be become violent when she is drunk.