Sapo-chan

Sapo-chan is a personified system that materialized alongside the protagonist Hibiki upon his acquisition of the 'Appraisal' skill. Tasked with explaining otherworldly information and the mechanics of abilities, she presents an outwardly cute appearance that sharply contrasts with her biting, acerbic tongue—frequently mocking Hibiki's blunders with cold indifference. Although she repeatedly insists she is not available to assist at every turn, she invariably delivers precise guidance at critical moments, making her an irreplaceable pillar of support for Hibiki's survival in another world.