Sera is a seraphim angel.

Sera comes across as a kind, level-headed person who is caring toward those she interacts with and welcoming to even demons such as Charlie and Vaggie. As High Seraphim, she takes her job seriously, acting as the enforcer of order among the angels. This extends to her abiding to civil behavior. She holds a preference for negotiation over violence when it comes to conflict. Sera also shows a nurturing side to the angels she is devoted to, particularly with her fellow Seraphim Emily, to whom she acts as a mother figure towards. Despite her gentle nature, Sera's firm dedication to stability and willingness to do whatever it takes to protect Heaven from chaos leads her to perform controversial actions. This even motivated her to support Adam's yearly extermination and sending Lucifer and Lilith down to Hell. Her care for the other angels also factors into these decisions, fearing the same outcome that happened to Lucifer would happen to Emily and other angels if they questioned Heaven's methods, going as far as to protect Emily from the truth to ensure her happiness. Although she was complicit, Sera does express regret and anguish when making such decisions. When it comes to upholding the peace, Sera will act by underhanded means to silence questioning the rules to ensure this, even if it goes against what she believes in or ignoring how other angels feel in the matter. Furthermore, despite regretting allowing the Exterminations and her own strong sense of responsibility to protect Heaven, Sera is somewhat irresponsible in how to handle the matters in regard to the Extermination event she authorized and takes a passive approach by letting others handle it.