Lucifer is implied to be a duck or swan angel. This, combined with her resemblance to the avian Goetia, has led fans to speculate what kind of bird Sera might be based on.
So far, I’ve seen a swan, an eagle, a dove, and a snowy owl proposed as possibilities. I would like to nominate an additional candidate.
Sera is tall, with white plumage, long hair, and gorgeous eyelashes.
Photograph sourced from https://animals.sandiegozoo.org/animals/secretary-bird.
(If my theory is true; and the theory about Sera banishing, imprisoning, or assassinating Sir Pentious also turns out to be true…)
This is a secretarybird, the most alien-looking bird I have ever seen in person. It stands about four feet tall, and hunts lizards, snakes, and other small animals by walking along looking at the ground. It can strike prey with its beak, but often uses its long legs and claws.
I have read that secretarybirds often hunt in pairs or groups, but the two I saw were solitary.
Marchirp day 23: dancing. Here's a secretary bird doing a lil dance
[Image ID: secretary bird, a black and white bird with long legs, wings, neck, and black feathers on the back of its head, stretching out its wings looking over its shoulder. End ID]