Tuner

Tuner (調子者) is a Unique Skill acquired by Gabiru as a result of Rimuru Tempest's Harvest Festival.

Sub-Skills

 * Unexpected Effects (不測効果): Allows the user to boost attack power only through unintentional action. It acted based on the user's mood - gain more strength only when excited and driven, and vice versa.
 * Change Destiny (運命変更): A mysterious skill that alters the user's own fate to the point of preventing certain death. Only can be used once a day on each target which means that the user can use it once a day for each different target. It cannot be activated intentionally.