In Breakfast on Pluto, a Catholic priest who broke celibacy, a young single mother, and the child they abandoned at birth embody the absurdities of Irish society. The indeterminate identity of the child, Patrick “Kitten” Braden, criticizes the Irish culture, long framed by nationalism and Catholic ideology, and challenges their legitimacy. Noting that Patrick is a transgender and homosexual, her/his identity can be explained by Butler’s theory of gender performativity. Her/His gender performance can be understood as resistance to Irish society, where nationalism and religion are closely united. Their dominant power forces the Irish people to conform to the rigid homogeneous norms. (S)he refuses to accept the gender binary, while trying to stand up to violence and strongly rejecting all kinds of brutalities committed in the name of justice. Furthermore, the repentance of Kitten’s biological father, Fr. Liam, shows the importance of rectifying a fault for the future. Fr. Liam’s sincere apology and penitence serve as an important stepping stone for Kitten to affirm her/his identity. Starting with reconciliation with the father, Kitten stops obsessing with her/his lost mother, the “Phantom Lady”, and becomes a mother herself/himself, thereby restoring the values that (s)he has been in search of. At the same time, Fr. Liam’s changed attitudes sharply contrast with those of the Irish community, which stubbornly keep what it believes. It emphasizes that overall, Irish culture, as well as the authorities in Ireland, needs to embrace an open vision.