Megumin

Megumin is one of the main protagonists of Konosuba, she is an Arch Wizard of the Crimson Magic Clan in the Fantasy World, and is the first person to join Kazuma's party.

Story
She decided to become an Explosion mage after a busty older woman saved her with Explosion magic when she was young. She claims she must cast Explosion once a day "or she will die".

While still attending school, Megumin would swindle food from Yunyun everyday since her parents couldn't afford meals. Due to her exceptional academic performance, Megumin was able to graduate early. When she left to travel alone, Yunyun predicted she would be “at a loss due to a lack in the means of survival, begging a useless guy for a meal”.

After traveling to Axel Town, she quickly gained a reputation as a crazy Explosion fanatic, thus parties refused to accept her before meeting Kazuma and Aqua.

Crossover Appearances
2K10 Anime Battle Coliseum

She is one of the Konosuba characters in the game alongside Kazuma Satou, if the player choose Kazuma and Megumin as a team, in the victory pose of one of the two characters, the partner will appear alongside Aqua and Darkness to pose for the victory pose.

Just Dance: Anime Dance Tour

She is one of the dancers from TOMORROW alongside Kazuma, Aqua and Darkness.

Trivia

 * "Megumin" is a Japanese nickname commonly given to girls named "Megumi", which means "blessing".