Much like Lilia, Ortho seems to enjoy pranks. He mentions trying to “play a trick on Leona Kingscholar by tying up his tail” and says that “When everybody’s attending ceremonies, the classrooms are all empty, making it prime time for pranking.”
Ortho seems more suspicious of those around him than Kalim and Silver: prior to Beanfest Rook says that he is advising members of the opposite team because he wants to “have a most delightful Beanfest, with all of you!” and Silver and Kalim respond with, “sensible enough”, “What a good guy you are, Rook!”, while Ortho says, “I’m more worried about how easily you both swallowed that explanation…”
During his birthday vignette Ortho explains that the students of Ignihyde try to hide information from him by using analog methods like handwriting, but “little do they know, I can expand my auditory range to eavesdrop on their planning meetings, so I still know everything they discuss.”
Ortho has been programmed to be able to lie. After a pair of bullies insult Idia he lies to Trein, setting up a screen on the Main Street of the school to project embarrassing videos of the bullies in revenge and then pretending otherwise.
During Special Soiree he sets up a surprise for Riddle to try and get him interested in treasure hunting by pretending to find a clue (that accidentally ends up being a real clue), immediately confessing the misdirect to Ruggie.
Ruggie tells him, “never, ever tell Riddle what you just told me.” Riddle is delighted by finding what they were looking for (unaware that the hunt was instigated by Ortho’s misdirect), expressing excitement at “the heart-pounding rush of anticipation right before (Ortho) opened the box…I’ve never felt this way before!”
Ortho reflects, “Maybe it was too stimulating for Riddle Rosehearts.”
When Ortho volunteers to infiltrate Malleus’ domain the Chief Engineer initially refuses to allow it for being too dangerous. Ortho pretends that the satellite he is using to connect STYX is passing into the planet’s shadow to escape the conversation and says, “if you don’t have anything ready by the time I get back home…Cerberus and I will permanently activate every sprinkler on the Island of Woe.”
When Ortho successfully reaches STYX he is chastised with, “what kind of child threatens his parents? I expect better of you, mister!”
Twisted Wonderland Reference Note 