Depends on the franchise/series but my mains are predominately female.
DOA: Kasumi as main, secondaries are Leifang, Jann Lee, Hitomi, Pai (5), and Ayane.
Street Fighter: Chun-Li and Cammy, also applies to VS. series if either or available
Also depends on titles. II are the mentioned above. Alpha series are the 2 plus Karin and Fei Long, secondaries: Rose, shotos and Dolls. 3 is Chun-Li plus Ken and Ryu (prequels). EX is Chun-Li, Ryu, and Hokuto. 4 and 5 are back with Chun-Li and Cammy.
Tekken: Julia and/or Michelle Chang, up until 7, Asuka had to be promoted
Besides Asuka as secondary along with Jun, Law and Nina. Katarina and Jin also are secondaries.
MK: Kitana
VF: Pai
SC: Seung Mina, Sophitia, Taki. Secondaries are Kilik, Maxi, Hwang and Mitsurugi
Darkstalkers: Morrigan, Felicia and Hsien-Ko (also applied to spin-offs and Vs. Series). Secondaries are Dimitri, B.B. Hood, Rikuo and Donovan.
Samurai Shodown: Nakoruru and Yoshitora (5 onward). Secondaries are Rimururu, Haohmaru and Jubei.
Capcom's Marvel/X-Men/VS games: Psylocke, Capcom side mentioned, Spiderman
Dragon Ball games: Android 18, exclude FighterZ since she demoted to Secondary back up
When used to played this series: Naruto: Clash of Ninja/Ultimate Ninja - Naruto and Sakura, Kiba (Storm series)
CVS/SVC Chaos: Chun-Li, Mai, Morrigan, Cammy
Other games like KOF, it depends who I can work with regardless on gender. Rival Schools are the Team Taiyo High (Batsu, Hinata and Kyosuke, plus Sakura in 1)