Riley
Riley is an upper-classman who is an assistant in Dr. Walsh's science class. He runs into Buffy and Willow and becomes friends with the two. He starts to fall in love with Buffy and asks her out on a date. They go to a party but the two keep getting pulled away from eachother Buffy is being stalked by a powerless Spike and Riley just turns out to be a demon hunter working for Dr. Walsh who runs tests on the demons. Riley learns of Spike's presence and tries to keep Buffy away from him. His attempts fail and he witnesses Buffy and Spike fight. The two find out what each other do and they fall in love and begin to date. After Dr. Walsh was killed Riley found out that the Initiative the government program he was in was giving him drugs to keep him strong and he was hospitalized by Adam. After Adam was destroyed the Initiative was closed down, but Riley is still on the show helping Buffy as a sidekick and boyfriend. Riley almost died when he refused government treatments to help him recover from the drugs they gave him. When he felt that Buffy didn't love him, he hired vampires to suck his blood. Spike showed Buffy what he was doing. Buffy and Riley broke up, but Buffy realized she was wrong and ran off to catch Riley before he left her for his secret operation in Africa. She didnt reach him in time and now he is gone for who knows how long. Riley is played by Marc Blucas.