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?

From Touhou Koumakyou ~ The Embodiment of Scarlet Devil, it's Flandre Scarlet! The younger of the vampiric Scarlet sisters, she's just looking for someone to play with. Problem is, she has the vaguely-defined and terrifying ability to just, uh, destroy anything. So she doesn't get many visitors. While most art of Flandre has her wearing Mary Jane-style shoes, when I was looking for reference pictures I saw this art of her by TOKIAME from Perfect Memento in Strictest Sense and noticed she had boots with cute socks / frills, so I went for those instead. Sometimes, it's nice to mix and match character designs for a long-running series like this, you know?