Motoki Furuhata
Motoki works at the crown arcade that Usagi loves to go to. Motoki's sister "Lizzy" works at the crown cafe.
Usagi and Makoto both have a crush on him, but it turns out he has a girlfriend named Reeta, who went away to Africa. Motoki was really crushed when she left, but Makoto and Usagi wuold still flirt with him.
He also tends to confuse the girls since he acts SO friendly to them. Mostly with Usagi, and Makoto, but doesn't have any feelings for them at all. In fact he told the two they were like sisters to him and nothing more.
When Motoki grows up, he wants to become a doctor, like Ami. He hopes he can get enough money to go to college, but is still waiting for his girlfriend. Later on in the series, his girlfriend comes back, but she needs to go somewhere else for another couple years. This makes Motoki sad, but he understands and tells her he will wait longer.