In creating a character I usually try to focus on two things; firstly to create an interesting non-humanoid creature and secondly to get at the essence and feel of that person. Numerica’s design, for instance, features both the literal and symbolic elements. While my stepmum really does have those bright eyes, the eight tentacles speak of her ability to juggle about a hundred different things in her busy charity work. Being a touch OCD, she may even appreciate the ability to have her influence in as many things as possible.
The interesting quirk of your own counterpart Arlo, is that he is the only one not to have true biological antennae. My intent was to use those for low level empathic abilities. However, Arlo has an artificial antenna implant, so he has a better read on emotions than other members of his species. Perhaps, he wanted to understand and therefore feel closer to the other species in Artinaut’s galactic neighbourhood? There is a strip in there, for sure.