Imp (?) trapped in a botched summon, released by the party
His appearance, due to a misunderstanding, was originally that of a small female succubus, and he originally spent most of his time invisible. However, as he was getting to know everyone in the group, he eventually transitioned to an appearance more to his liking (something closer to the traditional imp appearance, though without a stinger), and spends almost all his time visible, unless the group is around people who might be put off by him.
He seems to genuinely care about the party’s well-being, and acts actively to support them.
Feldon is an imp that was stuck in a botched summoning spell when a Bardic College was thrown into the Elemental Plane of Fire. He was released by the party and bound to everyone except for Callie and Varigate for a year and a day. At the end of that period, especially because of the efforts of Findorus, he joined the group willingly, traveling with them and helping them in their efforts.
It definitely seems that his time with the group has been changing him, and he seems less of a corruptor and more of a secrets-finder than he may have originally been. And while his morality is definitely more…grey, it is definitely leaning more towards neutral than evil, in that he more cares about himself and those he cares about than actually harming others specifically.
He seems to genuinely care about the party’s well-being, and acts actively to support their efforts. Varigate has also furnished him with a wand of secrets towards that end, which he treasures as his sole possession.