Mimosa is the youngest of Fluttershy and Autumn Blaze's children, and Frankie's little brother.

Mimi is a witty little guy with a kind heart and a very poor sense of personal hygiene. He's also a prankster and a bit naughty sometimes, but even if he gets in trouble from time to time, he wouldn't hurt a fly.

He is a little hyperactive, contrasting Fluttershy's and Frankie's calm and quiet nature, so more often than not is Autumn the one to deal with his loud and restless personality.
His mane is a headache to handle between how fast it grows and how much he hates to take baths, but the animals enjoy burrowing and nesting in it so he is usually the one to carry the critters around when they need to be transported, and he is absolutely amused by this duty of his.

Unlike his sister, he doesn't seem able to earn a cutie mark, but this doesn't mean he has no special gifts!
Mimosa loves animals and nature just like his mothers, and he greatly enjoys helping out at the sanctuary. Sometimes he might try too hard and end up making a mess, but he has the best of intentions every time. He also likes to do things his way and is very creative, which is in some cases the most efficient of answers and in some others just a recipe for disaster.

Mimi doesn't have any magical abilities as such, but his eyes do sizzle a little with strong emotions and his mane emits a bit of a sulfurous smell when he's angry. Autumn is worried he might have inherited some kind of Nirik form, but he hasn't shown any more concerning symptoms so far. Both of his mothers make sure to keep a close eye on him at all times, but of course the children have no idea.