In his birthday interview Azul says that, if he could have any student from Night Raven College as a sibling, he would choose Ortho as his little brother.
He claims that he envies Idia “for having the adulation of such a sweet sibling,” but soon reveals that he is extremely impressed by Ortho’s prowess at gathering information and doing calculations.
“If he were my brother, I’d have such an easy time compiling my monthly budgets and proceeds. Plus, when I finally expand my business beyond food-service establishments…Ortho would make for a powerful weapon, given how he can gather accurate intel with unmatched speed.”
On JP Azul explains that it was Ortho who introduced him to a boardgame that simulated making trade deals, which ultimately resulted in Azul joining the boardgame club.
On EN this line was rewritten to make it sound like both Shroud brothers were involved in convincing Azul to join.
In a vignette Azul claims to be helping Idia with maintenance on Ortho because he was impressed by their “beautiful brotherly love.”
Azul half blackmails, half bribes Grim into helping with the dangerous task of exchanging an important part of Ortho’s insides that boost his processing speed by 10%.
At the end of the vignette it is revealed that Azul was only participating in exchange for the expensive part that was removed from Ortho, “handcrafted by the renowned genius Idia himself,” that he intends to sell after its value appreciates even further.
While Leona repeatedly states in-game that he does not like interacting with children he seems to be unusually patient (or at least not outwardly hostile) with Ortho: even when Ortho unintentionally mocks him for his “feline nature,” which leads to Leona being teased by the other students, Leona merely excuses himself from the situation by claiming that he is “beholden to (his) feline nature” and simply must take a nap.
Twisted Wonderland Reference Note 