- Ortho and his Parents
Ortho refers to the Director and the Chief Engineer as Mom and Dad. - Ortho, Birthdays and Grim – Video
When asked about his past birthdays Idia explains that he would always receive a lot of games from his parents, but he would win so often that Ortho would get frustrated. - Being a Student
Pre-Book 6 Ortho did not have classes of his own to attend. - Ortho’s Abilities – Video
Ortho will often reference his “databanks.” - Ortho and Halloween
During Spectral Soiree we get a hint of how much Ortho dislikes ghosts. - Ortho’s Appearance and Games
Unlike Idia, Ortho’s hair is not a manifestation of a curse. - Ortho, Azul and Leona (more here: Azul and Ortho, Leona and Ortho)
In his birthday interview Azul says that he would choose Ortho as his little brother.
Leona seems to be unusually patient with Ortho.
- Ortho and Kalim
We learn in a voice line from Kalim that his magic carpet receives cleaning from Ortho. - Ortho, Eating and Being Helpful
Ortho explains that he doesn’t get his energy through oral intake. - Ortho, Mischief and Sneakiness
Much like Lilia, Ortho seems to enjoy pranks. - Ortho, Competitive
Ortho surprises Trey with his competitive streak. - Ortho, NRC and Hacking
Pre-Book 6 Ortho did not have classes of his own to attend and only attended classes on non-test days, with Idia. - Ortho and Wish Upon a Star
During the Wish Upon a Star event Idia is less than thrilled to be assigned the role of Stargazer, despite Ortho’s encouragement. - Ortho and Idia (more here: Idia and Ortho part 1 – part 2 – part 3 – part 4 – part 5 – part 6)
Ortho’s “burst gear” was inspired by a need to expose overheating circuits to air, designed (by Ortho’s request) to look like the ceremonial robes worn by the other students.
- Ortho, Malleus and Lightning
Malleus and Ortho do not interact often. - Ortho’s Gear
Ortho’s various capabilities change according to his “gear.” - Ortho and Deuce
Deuce takes Ortho to a blastcycle workshop by his home. - Ortho in the Main Story
Book 6 begins with a hunt for Grim and Ortho asking “Does it matter if the target is alive when we bring him in?” - Book 7 Summary
Book 7 begins with Ortho presenting the theory that the mirror in the prefect’s bedroom in Ramshackle is a connection to another world. - Ortho and Riddle (more here: Riddle and Ortho)
During Fairy Gala IF, Riddle compliments Ortho on his technological prowess. - Ortho and Vil
When asked what dorm (besides Ignihyde) he would like to join, Ortho responds: Pomefiore.
Twisted Wonderland Reference Note 