"Hm. And Orange usually has information gathering and recon. Terra seemed an exception, but I don't think they were meant to fight. They just got caught up in collateral."

Maybe he's reading too much into it, but who even - or what even - groups them into the colors before they arrive cognizant on the platform anyway? It can't be arbitrary. It can't be by chance; that it just so happens the strong are always in Red while those with inclinations to protect end up either in Blue or Purple the way Tidus points out. Orange made up of those inclined to being mentally astute, Nita and Senku coming to mind right away.

"In the memory from before...Blue was protecting some sort of king in his throne room, while Purple evacuated kids from a collapsing mountainside. They do run parallel, now that you mention it."