A close friend to Magos and Joseph, Lena is a skilled surgeon who struggles with her self-worth and the idea of chosen family. Her character grapples with themes of love, acceptance, and identity.

Santiago’s father and Magos's husband, he experiences profound grief in a more visible manner and wrestles with understanding his wife’s silent suffering. He plays a pivotal role in the dynamic surrounding Monstrilio's evolution.

An enigmatic being originating from Santiago's lung, M's journey explores identity, acceptance, and the dichotomy between monstrousness and humanity. M’s relationship with his family shapes much of the narrative’s exploration of love and identity.

Joseph's elderly relative who communicates through writing and gestures, and shares a unique understanding of grief, shaped by his own past losses. He offers unconditional acceptance and encouragement to M.

Joseph’s fiancée, whose relationship with Joseph reveals the impact of past traumas on forming new connections. His outsider perspective highlights the challenges of understanding and integrating into Joseph’s family.