Misaka Mikoto

Mikoto is the third most powerful Level 5 esper in Academy City, and is nicknamed the Railgun due to her signature move. Touma coined the nickname Biri-Biri and whenever the two meet he usually calls her that, even after his amnesia

Personality
To most people, she is considered a 'proper lady', but in reality, she's short-tempered, prideful, and has an improper attitude with some slight tomboyish tendencies and insecurities- a fact few people know of. Despite this, she is generally friendly and easygoing, and Saten Ruiko and Uiharu Kazari comment on how they are shocked to find that compared to other Level 5's, she doesn't look down on lower-level espers at all.

Often times she shows an incredibly childish, selfish, competitive side and even slight tsundere tendencies along with confused affections when taunted by her rival, Touma. To add to this, childishness, Mikoto has an inclination towards cute things, most specifically, Gekota and Kirugumar merchandise.

She also has a fear of bugs, as shown in episode 6 of To Aru Kagaku no Railgun.

Role in fanpage
Mikoto is one of the most popular girl in the fanpage. Despite this, though, she is often matched up with less popular girls such as Index,but mostly emerges victorious easily over the less popular girls. She can be considered one of the most popular non-Rie Kugimiya tsundere in the page, either than Asuna Yuuki and Kuroyukihime. Myth has it that she and Shana are arch rivals and she has a resentment towards Shana for beating her in the fight for the tsundere queen title.

In truth, Mikoto and Shana get along just fine and are very good friends till this day.