A very wicked, buggy boy. His is a fun design, though if you read Andlátkyn I imagine you hate him. 404 is partly based on beetles, moths, grubs, icky insects in general. The colors in his wings are indicative of deities with control over his existence and the power he's been gifted by them, regardless of whether or not they're present in Alagaësia or not.

However he doesn't always have them out.

A very spiky yet grubby bastard indeed.

And again, here's the sketch from earlier with him fighting.