She's a recolor of Insomni, A white skinned Yo-kai with a single turquoise eye accented by pale pink eye shadow and a dark indigo stripe with a yellow iris . She has long dark pink hair worn in two large horns on top of her head, held by black ribbon. She wears a dark purple dress with pale pink and blue material wrapping around her torso. At the end of her tail is a pale pink flame.
Sandi's powers function as the reverse of Insomni's abilities, where Sandi instead pulls you into a dream where you and her will have so much fun that you won't want to wake up. Sandi's grip has been known to last as long as six months.
Sandi rarely appears in the 6th Circle of Infinite Inferno.
Sandi is rarely available from the Mystery Way Crank-a-kai.
- Befriended: "Want to be friends? I'll give you some sweet dreams..."
- Loafing: "Sleepy, sleepy..."
- Receiving food (favorite): "That's great!"
- Freed from Crank-a-kai: "Thank you. I'll make sure all your dreams are sweet!"
- Freed from the Crank-a-kai (Wibble Wobble): "You're the one who set me free? Oh, thank you..."
Her Japanese name, "Onemu-no-sei", translates as "slumber spirit".
Her English name, "Sandi", is likely a combination of Sandman and Insomni.
Her Spanish name, "Morfea", is a combination of morfeo (sandman) and Insomna (Insomni)
- Sandi is an only Yo-kai in the ending not appearing in animation series.
- When snapped in the Yo-kai Cam, the tip is “You're not going to wake up for 6 weeks!"
- Seen in the end credits of Yo-kai Watch Blasters, Sandi puts a guard to sleep, helping Mass Mutterer escape.
- Sandi's hair is a dark pink in her printed media, medal, and Wib Wob form, but in the games, her in-game sprite has red hair.
In Other Languages
- Spanish: Morfea
- Italian: Oniria
- German: Sandy
- Portuguese (Brazil): Devanéia
- French: Morféa