Just a thought.
Kongou Mitsuko, Kuroko-chan's oh-so-dangerously-sexy-in-a-swimsuit ruival is shown to be a girl who is gentle and kind towards children.
Sure, Kuroko-chan seems coldly civil and polite enough to the toddlers under her charge, but do you think she actually likes children or is she one of those types of lesbians who thinks "children = sex + men therefore I hate children" and is only coldly civil to them like any other stranger just to be polite?