Heju

he's part of the volleyball team in Yilin's college & more or less a popular boy
sporty n fast boy but not the brightest
oblivious but a good boy, just really can't work w/ vague information n hints
maybe a bit too naive n trusting for his own good, you can tell him the most blatant lie & he'll believe you
like, maybe he registers that it might b a lie but he believes that if someone lies to him it probably has a good reason so he doesn't hold it against anybody
a pacifist,,, never gets angry, just sad/disappointed

sibling: https://toyhou.se/4604124.-aki