She is voiced by Caroline Combes in the French Version.
She is a small tiger-like creature with dark magenta color, her eyes are light orange.
Like all kwamis, Roaar can fly, levitate, phase through solid objects, and carry things that are bigger than her.
Roaar can transform the holder of her Miraculous into a tiger-themed superhero by going inside their Miraculous.
As a kwami, Roaar gives the wearer the power of and transforms them into a tiger-themed superhero by entering the Tiger Miraculous. Although unable to communicate to the wearer while they are transformed, Roaar usually knows what is going on during that time. Whenever the wearer uses Unknown powers, Roaar begins losing power and eventually can't retain the transformation any longer, leaving the panjas bracelet and reverting the wearer back to normal. Roaar is exhausted and out of energy afterwards, so to be able to transform the wearer again, he must refuel by eating food.
Thousands of years prior to the series, Roaar and the other Kwamis traveled the universe, unable to interact with any creatures, particularly humans. This was until a mage forged the Miraculouses, so Roaar and the others could both interact with mankind and grant them the ability to transform into heroes; Roaar and the Tiger Miraculous able to give a person the ability to grant other people superpowers.