As a knicknack, Bird House can change her body at will, from changing small details to just doing a whole new body for herself. Bird House likes her default shape, but she has a ton of different skins she wears over her stuffing and yarn for different occasions.

Her normal everyday outfit is a constantly mended mis-matched mess.

This is her knightly outfit, worn for special occasions.

The Cotton Labyrinth has nobility outside of having one of the people who made the world living there, and membership in a knightly order is entirely a matter of merit and responsibility. It's not by birth, natch, since every single knicknack is made by the Seamstress Supreme, manifest Heir of Creativity. Being a knight DOES get you access to a cool clubhouse and you get to put a "Knight" in front of your name, but it's kind of a hassle because any time a knicknack has a problem (and most of them have the intelligence of a 6 year old and behave like little weird goblins and they tend to get into really dumb problems) you have to help.

also Bird House is like 8+ feet tall