My Avatar is the Heroine

Su Lin, male.

Ability: Avatar

A skill that allows him to transform into various female characters, or to use female characters as his avatars.

Current avatars are as follows:

1. A long black-haired girl, characterized by: a school uniform, a plaid mini-skirt, and black over-the-knee socks. She excels at studying, her combat power is unknown.

2. A blonde girl, characterized by: a bizarre individual who constantly shouts, "I'm going to destroy Saber!" She wields a lightsaber and possesses immense strength. She has a self-proclaimed 'Nameless Victory Sword' ultimate technique. The mere aura before its release can strike fear into the strongest heroes. Currently, no one has been able to force her to fully unleash her ultimate technique.

Worlds: xxxx - Black Bullet - Demon Slayer - A Certain Scientific Railgun - ???