While Idia designs “oral supplement gear” for Ortho so that he is capable of eating with others, Ortho explains that he doesn’t get his energy through oral intake and doesn’t have any food preferences.
(It seems he is keeping data on the foods that others dislike, on the off-chance that such information may be useful one day.)
Instead of eating, Ortho will take photos of the food that others eat when they are around him.
He has an interesting voice line about how one of his android-dogs from Book 7 runs on electricity, “but for some reason it’s also interested in baked treats…even though it can’t actually eat them.”
Ortho seems to enjoy being helpful, offering his assistance to help in any way he can to any student, sometimes when his help is unwanted, such as when he offers to send a recording of Ace’s monologue during Phantom Bride to Epel, despite Ace’s disapproval.
After Silver injures himself during club activities Ortho offers his assistance, and at first Silver accepts.
Ortho creates a splint for Silver’s sprained ankle and Silver attempts to leave, but Ortho insists on doing “maintenance” on the rest of him.
Silver attempts to get away but Ortho strong-arms him into submission so that he can try out some of the functions that Idia has equipped him with that he has never activated before.
Twisted Wonderland Reference Note 