Yumi and Sam Sekemoto are two of the stock characters in Sunset Valley. I never thought about it before, but it sounds like the stock characters have different names in your game, Leto.
Probably the same as in your game. I've reinstalled it to English a long time ago for better communication on this forum. (Now I've got some trouble on another Dutch forum; 'How do I call this or that in Dutch?

I need to reintegrate in my own country.)