Originally, I hated Owen. He was homophobic and a typical jock douchebag, but he got much better after his gay brother, Tristan, joined the show, and he started dating Anya (who was always still too good for him). Honestly, though, his big brother arc with Tristan made me really like him, and I appreciate him much more as a character, despite him not being super memorable, verging on boring.
59. Marisol Lewis (10-12)
Marisol never really seemed like someone worth much of a plot whenever the story centered around her-- it's almost like she was meant to just be a supporting character. She was also a hypocritical homewrecker, as she helped KC cheat on Jenna (his baby mama and girlfriend), tried to get between Katie (her "best friend") and Drew, and exposed Katie's bulimia to the school. If anything, she was fake as hell, but definitely added to the drama. She got a little less flakey when she dated Mo, but their relationship was kind of a snoozefest.
58. Johnny DiMarco (6-10)
He was a great guy. Originally hated by many (including me) as his best friend killed JT and he stood by and watched when it happened, he had one of the best redemption arcs of the series. His relationship with Alli was really sweet, even if she was a little too immature for him. Contrary to what others thought, he was super smart and driven, and he helped the Bhandaris find Alli when she ran away from home. I wish they did more with him, but I'm happy with what they did do with him.
57. Joey Jeremiah (1-5, also in Degrassi Junior High and Degrassi High)
Joey was probably one of my favorite adult main characters in the series, but he wasn't in too many episodes after the first few seasons. I loved his fatherly relationship w/ Craig, and his on-and-off relationship with Caitlin (which I'm super bummed wasn't endgame), as well as his relationship with Spike and Snake throughout the beginning seasons. Angie was also cute and he was a great dad. Basically, his character was never super significant, but it'll always fill me with nostalgia of the old, first few seasons of Degrassi when I see him. He was definitely a more funny and spontaneous counterpart to the rest of the adults, though.
56. Tristan Milligan (11-)
It crossed my mind to rank Tristan higher than this, but I had to go back and put him here beforehand because it would be a total lie to say that I prefer him to most of the other characters. Honestly, I don't like Tristan, and he'd be even lower if he weren't such a significant character on the show. I appreciate his development and dedication to self-betterment, but ever since Next Class began, I can't stand him. He's entitled, rude, and straight up bitchy-- not even in a fun way. He treats Miles like shit and every time he opens his mouth I just have to roll my eyes! They've ruined his character and his likability has gone down the drain IMO, but at least he's dynamic. I'm so over his Miles stuff.
60. Owen Milligan (10-12)