From intricate armor builds to whimsical mashups, Thy Geekdom Con delivered some truly unforgettable cosplay moments! Held at the Greater Philadelphia Expo Center in Oaks, PA, this year’s event featured an incredible array of creativity that was featured at the masquerade and hall costume contests.

We’ve rounded up our favorite looks from Vocaloid, League of Legends, Demon Slayer, and more this weekend. Read on to see which costumes caught our eye and stole the show.

Masquerade

Mizi and Sua from Alien Stage

Jessica Rabbit from Who Framed Roger Rabbit?

Crybaby from “K-12” by Melanie Martinez, honored with a novice masquerade award.

Gawr Gura from Hololive

Black Parade Hatsune Miku mashup is rocking from Vocaloid / My Chemical Romance by @cam.does.cosplay.

Minori Hanasato and Haruka Kiritar from Project Sekai / Hatsune Miku Colorful Stage by @colorful.tomorrow.

Kanan Matsuura from Love Live! Sunshine.

Nono Daichi from Aikatasu!

A classic take on Hatsune Miku from Vocaloid.

Kagamine Rin and Len, also from Vocaloid.

Muzan Kibutsuji from Demon Slayer by @miacosplay101.

Mutsumi Wakaba from BanG Dream: Ave Mujica – The Die is Cast by @peachy_pink_ash.

Wanderer from Genshin Impact

Chuuya Nakahara and Ryunosuke from Bungo Stray Dogs

Junko Enoshima from Danganronpa

Angel Dust from Hazbin Hotel by @satinerougeburlyq.

Kanade Yoisaki and Mafuyu from Project Sekai: Colorful Stage

Bubble, Pop, and Solisk, original characters from the DND realm.

Kotori Minami and Mozomi Tojo from Love Live!

Matsuri Tokugawa and Emily Stewart from The IDOLM@STER Million Live!

Sparkle from Honkai: Star Rail by @healingcatcos, winner of a journeyman masquerade award.

Dia Kurosawa and Hanamaru Kunik from Love Live!

The Great Witch Shelby from Empires season 2 by @sunny_daze_cosplay, runner-up for both the journeyman craftsmanship and masquerade awards.

Sonic and Shadow from Sonic the Hedgehog by @rosesnowidols, judged to be the winner of the masquerade award in the journeyman category.

Akiyama Mizuki from Project SEKAI by @idoladora, recognized with a masquerade award for the masters level.

Elvira the Mistress of the Dark by @silvyr_shadow. We were fortunate to interview the real Elvira, which you can read on here. Their performance won the masters-level masquerade award, well-deserved.

Hanayo Koizumi from Love Live! School Idol Festival by @ominouspug, runner-up for the masters masquerade award.

Hall Costume Contest

Our judges for the hall costume craftsmanship contest were dressed for the occasion, including @kazistarcosplay as Mad Moxxi from Borderlands and @cosplay_hopeful as Izutsumi from Delicious in Dungeon.

Jynx from League of Legends. We previously posted an advanced tutorial on how to make your own Jynx costume. This costume won runner-up for novice craftsmanship category.

Steampunk Alien from the Aliens franchise. Emphasis on steam, as this costume emitted smoke on command.

Caduceus Clay from Critical Role by AncientOcean Cosplay (@ancientoceancraftsandcosplay), 1st place winner of the master craftsmanship award.

Usopp from One Piece by @hermitcosser, a winner of the novice craftsmanship award.

Vi from League of Legends, 1st place winner of the journeyman craftsmanship award.

Choso from Jujutsu Kaisen

Deku from My Hero Academia, a winner of a master craftsmanship award.

Belle from Beauty and the Beast in the holiday red dress, another winner of the master craftsmanship award.

Dreadtrap from Five Nights at Freddy’s

Maomao from The Apothecary Diaries

A creative interpretation of Marinette, also from Five Nights at Freddy’s

Are you one of the features cosplayers and would like to get tagged? Did we miss anyone you know. Reach out to us and we’ll add a mention.

Also check out our coverage of cosplay at other recent cons, including Katsucon 2025, New York Comic Con 2024, and Retro Con 2024.