Surpuissante mais trop prudente

Missing, extremely new, or very obvious to obtain.

A reference to the Japanese light novel series written by Light Tuchihi, titled "Cautios Hero: The Hero Is Overpowered but Overly Cautious." The plot is about a goddess who summons a hero with insane stats to save an extremely dangerous S-class world from a Demon Lord. The hero, however, is overly cautious, even refusing to enter the world's safest areas until he has trained to a level that he is comfortable with.