Reference sheet for Obsidian, a synth who moved in with us last week out of seemingly nowhere.
It appears to be quite old, retro, or even vintage for a synth, in terms of technology, but it is still fully self-aware.
Discussing with it may be confusing, as it only ever seems to use third person when referring to itself, ourselves, or whoever it's talking with.
Being a non-binary robot does seem to bring certain quirks along with it.
Synth base and species:  Vader-San
Obsidian exclusively uses it/its pronouns.