Ellninerr is a friend of Pintsize. They and another unnamed AnthroPC meet in a coffee shop. Ell's owner is into modding AnthroPC chassis.

In the newspost under the only comic Ellninerr appears in, Jeph mentions PC modding.

Transcription on also lists the unnamed yellow AnthroPC in 176 as Ellninerr. It's quite possible, as the second unnamed pink AnthroPC from this comic also appears with Ellninerr in 122 and Ell's owner is known for painting the chassis.