>Friend is based on the Cheshire Cat, vanishing leaving only his grin behind
>The scholar David Day has proposed Lewis Carroll's cat was Edward Bouverie Pusey, Oxford professor of Hebrew
>in Carroll's time Pusey was known as the Patristic Catenary (or chain)
>As a mathematician, Carroll would have been well familiar with the other meaning of catenary: the curve of a horizontally-suspended chain, which suggests the shape of the cat's grin.
Being a chain connects to the "freedom" theme, and Toobert has been making deep cut mathematics references himself with jokes like "clopen".