[IT MATTERS, OKAY. Just... not for... like... the reason she would assume it matters!!] If you know, then you know to be careful.

Don't give her any blood. You're too young and small. She can get it from somewhere else if that's her dietary habits. [It sounds rude as fuck, but he's only trying to be logical.

It's less he thinks Sierra is going to attack and take advantage of Kisa and more... he knows Kisa is a soft idiot who would gladly offer whatever to Sierra as kindness.]