Leon was born to a working class family in 2298. From there, he was immediately identified as gifted and was entered into the program for Titanic proselytizing. Through merit and skills, he was able to become the youngest member of the missionaries and became eager to show that he is superior to the other prophets. He doesn't go outside much, he has been raised in a life of isolation and solitude, having little awareness of life outside/beyond Titan prior to his boarding Jovia II.

He is motivated by an eagerness to spread the words of the titanic prophets while also making sure everyone knows he is right. He sees everyone around him as intellectual inferiors and wants to make sure you know he is right even when he isn't. He thinks that the major political organizations in the system aren't communist enough and don't hold true to the Visitors' teachings.