Don't know much about Castorice except her kuudere facade, but Aglaea really gives strong cougar vibes.
Castorice is bound to the Death Titan Thanatos which gives her, among other things, the 'gift' of killing anyone she directly touches, even Titankin. And she can't turn that off either.
While Aglaea can be pretty ruthless in keeping the peace, which includes snuffing out any rumours about what's beyond the skies thanks to the Titans wiping out civilisations that take too much interest in that.
So TB actually is in quite a bit of danger from them both.