What character from any manga would you want to be your little sibling,
and why?

perhaps they would be helpful to you?
or you like their personality?
or you want to protect them? (cause they're too precious)
or they're just too cute?

(It would be interesting to see your guys' ages/genders to see if the reason why you like the characters correlate with your age/gender, if its fine with you)

Off the top of my head, maybe Hina from 3-gatsu no Lion. Caring, good natured, but mostly a strong-willed girl who'd be a source of inspiration to have around. Oh, and Seki from Tonari no Seki-kun, it would be a lot of fun.

My current top 3:
Fullmetal Alchemist
Pandora Hearts
3-gatsu no Lion

Why just younger sibling? Anyways, I personally would like Deku from MHA. His seriousness and determination are something we share in common. I feel as though if he were my rival then I'd be more motivated to get things done like how I used to before I kind of let of my life cause of depression.

Chopper from One Piece. Best lil bro ever 😀

I feel that's already his character in OP so... it's not a very tough choice!