The search for the next experiment stops when Stitch falls in love with a female experiment that looks like him and names her "Angel", but Lilo is suspicious of her. When she looks up Angel in Jumba's computer, she discovers that the experiment turns good experiments back to evil by singing her siren song.
- Moral: You've got to believe in love.
- For obvious reasons, Angel is the only experiment to not be regarded as one of Stitch's relatives.
- Angel is a parody of Lorelei the Siren, as her song is an evil in the guise of beauty, much like the Sirens of ancient myth.
- In the Finnish version of The Series, her name is Seireeni, meaning "Siren."
- In the Arabic version of The Series, her name is Farasha, meaning "Butterfly."
- Angel is a reference to the Elvis Presley song "(You're the) Devil in Disguise", as she is considered by Stitch to be beautiful while she is evil on the inside.
- Pleakley is revealed to be fascinated by romances between two individuals.
- Like Stitch, Reuben has a crush on Angel, although she doesn't share the same feelings or even like him.
- Hämsterviel's phone number is revealed on Angel's pet tag.
- Angel wore said tag only once throughout the entire episode: when she was running up Mount Waiʻaleʻale with Stitch following her. She never wore the tag any other time.
- When Stitch gets blasted into a net, his feet are exposed, even though he should have easily fit inside the net.
- The net would have likely captured both Angel and Stitch in it.
- Due to a continuity error, the fur pattern on Angel's back is inconsistent. In her episode, it is an upside-down heart. In "Snafu", it resembles Stitch's, but disappears in some scenes. In Leroy & Stitch, she does not have one at all.