This paper investigates the impacts of emotion enhancement on self-identity and assesses possible ethical consequences of these changes. It introduces the crucial dimensions related to the self which emotion enhancement may endanger—emotion standards, narrative identity, self-objectification, and freedom of hope and pursuit. I argue that the ethically salient issue with emotion enhancement is its impact on autonomous agency—whether one’s actions and beliefs are one’s own, and how the relational autonomy may be hindered or fostered. The changes arising from emotion enhancement (...) may be considered to belong to the same self as long as such changes do not alter the individual’s internal value system and the individual identifies with such changes. That being said, emotion enhancement remains unjustified in terms of freedom. Even if the emotional enhancement is performed out of free will, it does not bring freedom in the true sense, and thus threatens the subject’s special kind of being as the same rational agent. (shrink)