Myr

It would be interesting to be able to use them as different story devices. I once used these small telepathic Dragons as familiars to help the party collaborate more as a group. They would start to take on elements of the players associated with them. U can design them as a tool that can be subtly help them, but really leave them in a spot if they get taken or something goes awry.

Maybe a myr in charge of setting up a luxurious camp at night, but if it gets taken at a point in the story, they don't recover hit points as fast cuz they aren't used to roughing it. Or an alarm myr used to help warn the party but gets "sick" and does it when everyone's trying to sneak.

You could always look up basic equipment as well and maybe add a fuel source for them to stop and pick up side quest for fuel. A walking lantern who needs oil. A caltrop maker who feeds unworked iron ore. A fetcher who requires feathers.