Aiko Barb

Yua's little brother. He's a bit younger but a lot taller- with Yua standing a little below average at about 5 foot and Aiko above average at about 6 ft 5 in, he has the potential for massive annoying little brother energy and takes full advantage- their relationship is actually very affectionate, it's just also based a lot on Aiko giving big sis a hard time and being a lil shit, but getting away with it because he's the babby brudder and also can just pick her up. If anybody else teases her though he'll put them through the wall (well, mostly all he has to do is threaten to, at his size)- that's HIS job. 

He is essentially a total himbo. A bit immature and sometimes mischievous, but very wholesome.