Most of the time characterizing Smarmadine is cake; he's a cranky little silhouette who hangs around glaring at this or that and not saying a thing.
Smarmadine is loyal to Flume, not for any affection or gratitude, but simply because she is there, and as much as he hates people, he hates solitude even more, and since they are already together he would be inconvenienced to have to accept a change.
When he does talk, it is in a low, growling tone, like an angry, frustrated child forced to be civil. He may point things out for Flume or mutter a complaint, but he- of course- hates the sound of his own voice and really prefers to just skulk around and let Flume do what she will.
Smarmadine is not overly hateful or offensive, however, and is unlikely to tell anyone anything overly hurtful, or at the very least, go out of his way to do so.
To reiterate, Smarmadine is not a pet or an animal, he is a sentient alien who was either purchased or abducted by the Kokoparvests and is under Flume's protection and has chosen to stick with her.
Smarmadine is not very strong or ambitious. He is good at spying or picking things up from hard to reach areas, when persuaded to do so. Smarmadine can fade his molecules around would-be wounds and change shape enough to slither through tight spaces, but the most articulate forms he can take on besides his normal one is just a black puddle.
Way back in.... 2006, I think, I composed a story about a little lost alien named Jello who had to travel the very silly galaxy to get home after being abducted by Kokoparvests and sold into the slave trade. It was a fun, childish, cartoonish tale, and set a number of ideas in place. The story laid dormant for a long time, but recently I have been taking elements from it, as well as from a similar cartoon I had developed, and fitting them into a new, more functional universe. For this reason there are many ludicrous elements; the overpowered Rugens, the outlandish spaceports, and the incredibly convinient plode cores are all from my early exploits into aliens and space, and even now that I "know better," I have decided to keep many of them in, as an homage to those early days.
While Jello was being neglected I continued to revisit the little background race I had invented to abduct her; a combonation of Kokopellis and Harvesters that were heavily influenced by The Insect God and that continued to fit into stories where no other sort of thing would fit. When I began work on TBOS, I decided to keep all of their vastly different incarnations as subspecies, and all around them a universe grew up almost on its own.
Among Jello's original little party was this spiteful little creature Smarmadine, and though his story is small, I thought that if I was going to use the same universe I really ought to honor one of those concept-creating characters.
"Smarmadine" was an incorrectly remembered version of the word "smaragdine", meaning emerald green, which has nothing to do with his character but I tend to tint things pertaining to him in green tones anyway.