Ti's Links
Thorn is Ti's little brother. While initially very jealous of his clutch, he eventually chilled.
Ti is Thorn's big brother. While they don't interact a ton, Thorn does rather look up to Ti.
Ti has a good if boring relationship with Ouryuu. They don't butt heads much, as Ouryuu tends to be gentle and proud of Ti no matter how much or little he does, unconditional love.
Ti seeks out validation from his other parent, Kohryu, instead, due to it being much more difficult.
Ever worried about Ti's safety and happiness, Ouryuu's done his best to provide for Ti in everyway he can. From keeping him (or, her, at the time) hidden for the first several months of his life to giving him his own little world to rule, and everything in between. He loves when Ti drops by his world, and worries he might be smothering... but can't hardly help wanting to express his love for Ti.