Though given "Jane" and "Ken" I really shouldn't make fun of Male.
Male is the placeholder name for the player's character during testing. The player will be able to name their character. There isn't a default name. So instead of naming him "?", "Male" is the best placeholder. And the same can be done if the player chooses the female hero.
Jane and Ken are only NPCs that follow the player for a brief period, for a particular romantic entanglement quest.