Leo is this universe's god of the afterlife, They play an extremely important role in the series. They are mischievous and can be random, they are usually smiling and messing around. Without going into spoilers, they may also show a deeper range of emotions later on in the series, but in the beginning will mostly just be silly. They somewhat remind me of The Collector from The Owl House, but a bit older, to give you an idea of how they might sound, they are also genderless and im willing to let them be voiced by anyone of any gender. More images of them can be found here - https://toyhou.se/18514207.leo