Sebek will compliment others when they do something that pleases him in relation to Malleus, such as Rollo being familiar with Malleus, Noble Bell College being suitably clean enough for Malleus, the students preparing a flattering outfit for Malleus, and Epel and Riddle volunteering to serve as bait for the fire lotuses to take the fall for Malleus (“Um, we’re not taking the fall OR doing it for Malleus…”).
Sebek announces that he will be helping the Fairy Gala IF team in order to earn Malleus’ commendation, and he begins crying when Malleus says that he will not insist on hearing an embarrassing story about Sebek and instead content himself with knowing that Sebek is bonding with people from outside Briar Valley.
Book 7 involves Sebek being present at the dream-versions of multiple important milestones: he is moved by the thought of potentially seeing “even a tiny glimpse” of egg-Malleus, declaring that their objective is to reach the eastern stronghold as soon as possible so that he might do so.
He is similarly moved by being present for what was possibly Malleus’ naming, and is extremely concerned for the egg when Maleanor begins to strike Lilia with lightning, as Lilia was holding the egg at the time. He is also present for the dream-version of Malleus’ hatching.
There will occasionally be instances where Sebek is jealous of those towards whom Malleus pays attention: Malleus declares that he likes a goat during Glorious Masquerade as a creature that does not fear him and Sebek declares, “Wretched goat…you must learn your place!” (Jamil: “Again, you’re not in competition with the goat…”)
Sebek also tells the prefect not to get a big head just because Malleus happens to like Ramshackle Dorm: “…and for the record, I am NOT jealous!”
Twisted Wonderland Reference Note 