Leo was one of the first of his species, being activated alongside his brother Jen. He is a Beta from the original Genesis 1000 batch, but finds himself and his power more suited to the Feta lifestyle. Leo is the designated fertility doctor of the Valley: it is his job to make sure families can have children. Outside of this job, however, he is positioned to help fertilize crops and fast-track their growth, as well as help animal populations stay in check and revive potential extinct species. Leo helps to maintain a necessary balance in their home, and uses his powers responsibly at all times.

Leo has a tendency to be flirtatious around women, but not nearly as flirtatious as he is around Alice. He has quite the soft spot for her, and takes any chance he can to show her his affections. While these affections are relatively lost on Alice, her husband Vincent despises this. Leo knows this and has made it a secondary goal to agitate him. Outside of his regular work and mood, he is a very attentive and caring father to Maple and other young children in the Valley. He is fairly laid-back and does not let a lot burden his conscience, choosing to focus more solely on the things that he knows are fruitful.