The prefect sometimes gets new clothes for events and sometimes does not. This is a list in order of release, with relevant in-game comments (EN events only).
Beanfest: Camo Jacket
“A bean blaster-the smaller model. Bean bags, two magic camo jackets…might as well put the camo jackets on now. Here, Prefect, take one. The colors look loud to friendlies, but from the monster team’s POV, they make you blend in with your surroundings optic camo-style.” – Cater
Fairy Gala: No description?
“I guess you don’t look half-bad yourself, for an herbivore.” – Leona “Yes, Prefect, you’re certainly going to fit right in at a fairy engagement.” – Jamil
Phantom Bride: No Outfit
Wish Upon a Star: No Outfit
Halloween: Ghost costume? Made from curtain scraps.
“You look like the wimpiest ghost on the block.” – Grim “It’d be kind of sad if you were the only ones on campus not in costume for Halloween, right? So we threw these together with some curtain scraps.” – Ghosts “If you wanna thank anyone, thank the ghosts. They made the costumes.” – Ace
Master Chef: No Outfit
Vargas Camp: No Outfit
Firelit Sky: No description?
“Wow, Prefect, you look fantastic too! That outfit works great on you!” – Kalim
Harveston: Apple and floral-patterned outfit.
“I must say, that looks perfect on you, Prefect.” – Sebek “Yes, the adorable apple and floral pattern suits you.” – Jade
Port Fest: No
Glorious Masquerade: A cape, matching with Grim?
“Heh heh. Sure, you can’t hold a candle to me, but you look pretty slick in that cape.” – Grim
“Your ribbon spreads out in the back like a cape too, Grim. It looks like you two are wearing matching outfits.” – Deuce
Cloudcalling: No outfit, only a ribbon
“Pretty cool, right? This is what me and Prefect are gonna be wearin’.” – Grim
“Huh, so you two put ribbons on, huh? Even just a ribbon makes a big difference.” – Lilia
White Rabbit: Outfit that includes rabbit ears and tail
“You look like one of the topiaries from the park come to life.” – Silver
“The ears, the tail! You really pull them off!” – Epel
Stitch: Tropical shirt and hat that “kinda” matches Grim
(To Prefect) “You’re lookin’ pretty good yourself with that tropical shirt and hat. (To Grim) Actually, you and Prefect kinda match. When you’re side by side, you REALLY stand out.” – Ace
Playfulland: Similar jacket to Leona with frills similar to Lilia.
“Looks like you’ve got the same kind of jacket as Leona, Prefect. And frills like Lilia’s. I’ve never seen you wear anythin’ like it before I have to say, it’s nice.” – Jack
Tapis Rouge: Khaki brown outfit to match the rest of the students.
“Looks like they put you in the same khaki brown as the rest of us.” – Azul
Nightmare Before Christmas: Patchwork outfit. Similar to Sebek?
“What are you doing in that bizarre patchwork getup? Wait, I’m similarly dressed?!” – Sebek
Eternity Float: Light pink accessories
“The light pink accessories look especially nice on you. You really are a little shrimp, just like I’ve heard.” – Georgina Leech
Twisted Wonderland Reference Note 