Based on her appearance in The Legend of Zelda: A Libk to the Past (and A Link Between Worlds, and Super Smash Bros. Ultimate), it's Princess Zelda! I particularly like how she's portrayed in Smash- she's got a little bit of sass in that one, so I gave her a little wink here, it's cute.
#MS Paint World
From the original Pokémon games, it's Erika, the grass-type gym leader of Celadon City! Probably not the first gym leader people think of from this era of Pokémon games, but I really like her design and her team includes Tangela and Vileplume, some of my favourite 'mons. I haven't played a Pokémon game since, uh, the 2000s so I'm very behind (except I know Iono is very good and cool) so when it comes to the Pocket Monsters, this is the era where I live, I guess.
From Do It Yourself!!, it's Serufu Yua (say it the Japanese way, surname first, for the joke) and Miku Seride spending some time on the self-made bench outside the DIY club room! I like to think that Serufu is so scatter-brained and in her own little world that she has no idea what she's doing, so Miku just has to handle it as best she can. Bless.
From SoulCalibur II, it's Cassandra Alexandra, Sophitia's sister! She's one of my favourites from the Soul series, although the reason I wanted to draw her is I've been playing Warriors Orochi 3 Ultimate lately to unlock Sophitia (yes, she's a character in that) and that reminded me, I've drawn Sophitia but not Cassandra. Time to correct that!