Super String is a role-playing game for mobile phones. It features 100 agents, and they come with unique skills and abilities. You have to build your team and lead the agents into the battles, and your main goal is to defeat the enemies and save humanity. It is available for free on android and IOS devices.
Yohan and Oh Sejeong are the leading characters in tier S; they are the best result-oriented characters in the game. The best characters in tier A are Ikho and Shin Heyool; they are almost as good as A tier.
Lee Baeksu and Bangia rank in the B tier, while Guardian and CRF Soldier rank in the C tier. Some characters in tier D are Reaper Seeker and Tutee Reaper; they are considered the weakest of the lot.