Ashley and Alissa have a Mom and an Aunt Rachel who appear in "Aunt Rachel Is Here!" in which it is revealed that Ashley's and Alissa's Aunt Rachel is getting married and that Ashley and Alissa will be in her wedding. Alissa has a cousin named Jill, who is almost the same age as her and Ashley.She has a grandmother.
In "It's Tradition", Ashley and Alissa reveal that their family celebrates their own holiday Sister Celebration since there's so many sisters in their family. It is unknown if Alissa is allergic to milk like her twin sister, Ashley.
Alissa's favorite game is Looby Loo.
- Twice Is Nice! (first appearance)
- Barney's Talent Show
- It's Tradition
- Oh, Brother...She's My Sister
- Barney's Halloween Party (cameo)
- Aunt Rachel Is Here!
- Barney's Night Before Christmas (cameo) (final appearance)
- Ashley appears within all of her appearances.
- Alissa never appeared without Ashley.
- Neither Alissa nor her twin sister, Ashley, appear with Kathy, Carlos, David (Kenny Cooper), Juan, or Kenneth in Season 3. They appeared with Emily and Stephen in the picture.
- Alissa never appeared with Maria, unlike Ashley.
- Alissa appeared with Keesha at the same time, although both did appear in "Barney's Halloween Party" and "Barney's Night Before Christmas". She also appeared with Curtis, although both did appear in "Barney's Halloween Party".
- Alissa only appeared with Chip, Danny, Kim, and Linda in "Barney's Night Before Christmas".