In her costume from The King of Fighters '99: Millennium Battle, it's Athena Asamiya! There's a lot of good Athena costumes across the series, but while my favourite is probably the 2002 / NeoWave one, I'm a big fan of this '99 one where she cut her hair short and went for this seifuku / crop top / hot pants combo. Nice boots, too. This is also the look that showed up in SNK Gals' Fighters, leading to an amusing ending where she wishes for her long hair back then has to cut it again. Oh well.

From Tech Romancer, it's Pollin, pilot of the Dimensional Crusader mech Bolon! I haven't played nearly enough Tech Romancer but it's no surprise I like this character design. She should be friends with Devilotte, I think.

From Samurai Shodown and wearing an outfit from Nakoruru: Ano Hito kara no Okurimono, it's Nakoruru's lil' sister, Rimururu! I first saw this outfit when going through the Samurai Shodown NeoGeo Collection gallery for SNK vs. Capcom Card Fighters 2: Expand Edition and thought it looked really cute, but it turns out it was originally in the Nakoruru visual novel released a few months prior. It's a really cute look for her, and pretty different from some of her other outfits! Hopefully I caught the muted colour palette feel of the original art~

From Yu-Gi-Oh! Duel Monsters, it's Dark Magician Girl! I won't lie to you, I don't play Yu-Gi-Oh! or anything at all. What I can tell you, though, is that Dark Magician Girl is cute, and I wanted to draw a cute magical girl, so that's how we ended up here. I'm sure that's not a problem, right?