Yabe Sumako

About
The vice chairman of the Kunlun Student self-governance Association/崑崙学生連合自治会 and a 3rd year. She seems to be doing quite well until Amatsugami Hidehiko starts terrorising the island. She is accompanied by her hedgehog, Harrison.

Kozuki Sayoko said she is a very capable woman who handled the immigration and customs bureau before she did. They both seem to care quite a lot for each other with Sumako being sort of an older sister to her.

She normally seems to be a composed and capable leader who is somewhat strict but generally a nice person. She is rather quick to doubt herself and seems to break under a decent amount of pressure. In this state she starts taking advice from Harrison the hedgehog, though it is rather likely she is just deluded in that state.

She has the unenviable tasks as vice chairman to hide the actual chairman. A proud task that has been kept up for the previous 51 chairmen who were apparently all far too weird people. The current one pretends to be a Heian era aristocrat which isn't exactly a good look for the people of the student association.

She tries to keep him under wraps and handle the things whilst occasionally reporting to him and somewhat taking his advice on what to do, probably to keep him placated. During this point she orders the assasination of Hidehiko and Sayoko by Honoka. Later on Sekimori is also tasked to do this, but probably on the orders of the chairman himself.

As things gradually go wrong due to Hidehiko, she starts to crumble and worry that people refuse to listen to her and that she is being made fun of. She starts to scheme with her Harrison the hedgehog whom she believes is informing her of the situation. In this state she is still somewhat capable of regaining herself and assaulting Golden Industrial HS after hearing of them kidnapping woman to sell into prostitution and their planned uprising.

She is captured during this, freed by Hidehiko and sort of helps him out by ordering Sekimori to leave. For this she is later presented as gift to Hidehiko at the student association HQ where she then proceeds to have a further breakdown about her not being good looking enough to even be a gift. Hidehiko accepts this gift and she joins him after.

Her ending sees her go on to study medicine, but she has an epiphany and turns into a (fallen) angel just before the turn of the century. She flies off and schemes to destroy the world with Harrison.

Abilities
She is a very capable woman who is capable of managing Kunlun by herself despite the chairman's best efforts to be a nuisance. Her academic stats are 7, 8, 7, 4 (humanities, science, foreign lang, PE).

Her special ability has her hedgehog buddy, Harrison, make a charming cry. This reduces an enemy's defence to 0.