Blue Archive is a free-to-play role-playing game. The player will need to lead the students to resolve the incidents that occurred in Kivotos. You have to train the students, make new allies, and lead them to victory. You can also form new relationships with students. It is available for free on the Google play store and Apple app store.
The leading characters in tier S+ are Haruna and Hibiki; both of them are attackers. Hanae and Kotama are the most prominent characters in tier S. Hanae is a healer, while Kotama is a supporter.
Akari and Serika are the best characters in tier A, and they both hold the middle position. Chinatsu is a healer, and Eimi is a tank in tier B. Some characters in tier C are Asuna and Juri.