- Ace’s Family
Ace seems fond of his older brother. - Ace and the Prefect (pt1) – Video
Ace may have a closer relationship to the prefect than any other character. - Ace and the Prefect (pt2)
Ace says he has a hard time taking Rook’s compliments and asks for the Prefect’s opinion during the Phantom Bride event. - Ace and Epel
More: Epel and Ace part 1 – part 2 - Ace and Riddle (pt1)
More: Riddle and Ace - Ace and Riddle (pt2)
At the start of Book 1’s duel Riddle collars both Ace and Deuce before they have a chance to attempt a spell, and Ace punches Riddle in the face for insulting his parents. - Ace and Riddle (pt3)
Ace says that Vil gives off the same vibes as Riddle and tells Jack, “Mistake (Riddle) for a friendly hedgehog and you’ll quickly learn he’s actually a furious porcupine,” but he seems fond of Riddle all the same.
- Basketball and Mimicry
In his dorm vignette we see that Ace has an impressive short-term memory, is adept at mimicking those around him, or both. - Malleus and Trey – Ace and Malleus (video) / Ace and Trey (video)
More here: Malleus and Ace / Trey, Advice and Ace) - Standing Up
Ace standing up to people in positions of authority who are objectively stronger than himself is a running theme. - Ace and Cater
Cater and Ace meet for the first time right after the opening ceremonies and during Heartslabyul’s welcome party, when Cater overhears him trying to convince Deuce to sneak into the headmage’s office. - Wind Magic, Pranks and More
Ace seems to particularly excel at wind-based magic.
Ace says that he is good with his hands, having practiced sleight-of-hand tricks so much that now he can perform them equally well with either hand. - Jamil and Ace
Jamil and Ace’s teasing/supportive relationship
- Phantom Bride (pt1)
The Phantom Bride event begins with Ace laughing at the idea of Idia being a “perfect prince,” only to be harassed by Crowley about the impending public relations fallout until he agrees to help. - Phantom Bride (pt2)
After the rescue from Eliza Ortho encourages Idia to thank Ace and the others for their efforts, but Ace is less than pleased with Idia’s reaction of, “Would’ve been nice if they hadn’t cut it so close.” - Ace and Lying (pt1)
Ace is wholly capable of lying to someone’s face without reservation. - Ace and Lying (pt2)
In addition to stealing, Deuce says that Ace cheats “the entire time” when they play card games, “so it isn’t fun at all.” - Ace and Ambition
As a mirror-image to the hardworking Deuce, Ace is constantly trying to get out of tasks or complete them as fast as possible, even deciding to give up on getting a magestone from the mine during the prologue. - Ace and Deuce (pt1)
More: Deuce and Ace
Twisted Wonderland Reference Note 