two things
one, why lie and say it's your cousin bro, i think lying and saying its your cousin is 10x worse than just saying something like "its another type of creature" or "its a friendly creature" or something along those lines
and two, im not concerned that its a loli (because it doesnt matter, it's just a mini-sized girl) but please don't be that useless mc's assistant who just is here for comedic relief