Missi is revealed early-on to be very talkative, not giving others a chance to get a word in. Though not selfish, backstabbing, greedy, or manipulative like many of the other female characters on the show, she can be kind of quirky and odd. Though she is smart, well-meaning, and kind.
In "You Do Know What The Lollipop Is For", Jake comes home on a weekend leave from the Army, meets Missi, and is smitten right away. They begin a short affair, but as Jake is leaving to return to base, Missi reveals to him that she has a boyfriend. This leaves Jake wondering how he can compete, but also wishing he "did it" more with her.
In "Avoid The Chinese Mustard", Jake and Missi plan a rendezvous at the beach house, which does not go well when Alan is informed that Jake went AWOL from the army and Jake confesses his feelings for Missi, making her uncomfortable. She convinces Jake to go back to the army, saying she really likes him, but is not serious about a relationship.