Dave (🚫🖌️)
After the flood, he wanted to know why this happened, but he didn't want to be a scientist due to his past incident, so he became a marine biologist. (But that's still science but hey, at least it isn't rocket science.) He of course, has a son, Tristan. He makes sure that he doesn't stray too far from home. He has to take Tristan to work with him because he can't trust him to be home alone.
Muko (🚫🖌️)
Muko resides in the Twilight Zone, his job is to keep check on the population of certain species (e.g. critically endangered species like Chaossaurs, current population is 5) and the amount of deaths caused by sea creatures. He and Dave talk to each other sometimes, but they're very busy at the moment so they're unable to speak with one another.
Will add more when I have more characters!!