I already wrote "I don't know the relation among them, and it's ambiguous even whom 彼女 refers to is since I don't know who ねじれ is." That sentence only says that 甲矢 and ねじれ are best friends. If 彼女 refers to 絢爛崎, there is no problem that 甲矢 and 絢爛崎 are in love.