Karen
The only member of staff who is in any way attracted to Martin is Karen. She even goes as far as to write a poem about him. Why Karen finds him attractive is not really known, but she tries to make herself attractive. Martin is too often busy being attracted to Caroline to pay attention to Karen.
Eventually, Karen and Martin do have a relationship, which Martin tells Boyce is somewhat oversexed. Karen seems to want to do it with him constantly, which led to Martin several attempts to dump her. However, most of them failed, or Martin changed his mind at the last minute. Their relationship finally ended when Karen saw him with a prostitute which Martin accidentally became her pimp.
Read more about this topic: Martin Dear, Relationships