七祇 紅音

One of a pair of twin childhood friends of Sora.  As a child, she and her twin sister interchanged, interacting with him without him realizing.  Part of this is because Devil Hunter twins are essentially the same person (the same soul/basic personality) and only grow distinct self-conscious awareness as they grow older.  She and her sister share the same emotions toward Sora (literally identical) though their current personalities 'filter' it differently.

She resents Akari's seduction of Sora years ago, as it caused him to believe he had raped her, leading to him putting some distance between them... and because, like all such twins, failure to obtain balance leads to ruin.

She hides beneath her role model student exterior a vicious, merciless personality whose only real love is Sora and her twin sister (though it is really a love/hate relationship with the sister).  She despises her aunt, who raised her, with enough intensity to want to see her dead.  This is because her aunt's appearance is identical to that of her mother, who 'fell' long ago and abandoned them.