Kevin O'Connor is an Adams College musician who dates Sabrina Spellman during the fifth season.

In "Love is a Many Complicated Thing," Kevin is set up on a date with Sabrina by Morgan with whom he shares a Philosophy class. Though they have a disastrous first date as Sabrina was wrapped up in a love triangle between Morgan and her boyfriend Josh, they reconcile and begin a relationship.

The relationship begins to intensify when Sabrina invites Kevin to come with her and friends to Florida for Spring Break in the episode "Beach Blanket Bizarro," making her question where the relationship is going. However, Kevin and the rest of the beach being placed under a "good clean fun" spell keep him from revealing his true feelings.

Their relationship ends in the episode "Sabrina, the Muse" when Sabrina, attempting to be Kevin's musical inspiration, realizes that he has not taken any time to get to know anything about her and is very self-centered, forcing her to break up with him.