Yellow 9.

"Yellow 9" was a character in "8-Up: The On-Line War!", a comic i did from 2004 to 2006, and never finished. i was really into ".hack" at the time and of course, the "oh wow i have a purpose in this game" concept was apparent. it involved 3 teams: the Red, Blue, and Yellow teams, each with 4 people. the Red team was the "good" guys. the Blue team was the "bad" guys and wore baseball hats. the Yellow team was all-female and were "neutral" in a sense.

...that's all i had, and the series took a dive because of my horrible writing skills.

Y9 did have a big-ass gun, and utilized it to the best of her abilities.