Zest

Zest is known for her fierce loyalty to her master and her cold, calculating nature, never going against his wishes. She does, however, not practice blind obedience and will advise her master if she feels his decisions will have undesirable consequences. Nevertheless, this does not mean she lacks the capacity to feel emotions. Her emotions became even more apparent while serving Shella, and later, Basara. She appears to have an inferiority complex and constantly questions whether she is useful enough to her master. She is also revealed to have a humble and meek personality when not fighting her master's enemies, and is the only one among those bound by the master-servant contract to address her master with the honorific "sama."