Stella is a tall avian Goetic demon with a short pink beak and small, gray face-markings below her eyes. Her eyes have red-pink sclera, white pupils, and long feathery-like eyelashes, and she wears pink eyeshadow. Her feathers are white, and she has long, gray-tipped, white feathery hair with a large gray stripe on her head. She also has black, claw-like nails.

Stella seems to be very temperamental about her husband's infidelity to the point of verbally and almost physically attacking him while screaming, breaking a lot of possessions and even assaulting an imp butler.

However, she seems to be more baffled by said infidelity specifically happening with an imp, a demon of lower position; she is also incensed that Stolas spoke of his inability to go to a motel to consummate it. Given Octavia's indifferent attitude towards her aggressive outburst, it can be assumed Stella has these outbursts on a frequent basis.