The Jellato Sisters (Kuriore and others in Japan) are six sea angels. In The Legendary Starfy, they have X shaped mouths and live in Chillydip Cove with their friend Piplion. They are white in color with a heart on their chests.
Exclusively to Densetsu no Starfy 2, the first three Jellato Sisters have separate names. These are Kuriora (Japanese: クリオラ), Kuriore (Japanese: クリオレ) and Kyuuriore (Japanese: キュウリオレ).
In Densetsu no Starfy, the Jellato Sisters are first seen by Starfy in the Sea of Ice where they appear frozen in ice, apparently prior to Starfy's arrival, they were attempting to fight off the nasty swordfish Boerun, however he was too much for them and easily defeated them by having them headbutt each other, their impact caused icicles from the ice cave's ceiling to fall on to them thus freezing them, luckily they were found by the big lipped trio of Lovely, Loverin and Lovelove who requested Starfy's help in unfreezing them.
Densetsu no Starfy 2
In Densetsu no Starfy 2, three of the Jellato Sisters are seen by Starfy in Slippery Ice Alpine (Stage 4-1). In a flashback from Kuriore, the three are attacked by Puchi Ogura #4's fire-breath. To check that her sisters are well, Kuriore gives out two letters to Starfy (Letter 1 and Letter 2) and asks him to deliver them to the other two Jellato Sisters, Kuriora and Kyuuriore respectively. After Starfy locates them, they each leave a reply (Reply 1 and Reply 2) and Starfy has to give both replies to Kuriore. After Starfy delivers both replies, Kuriore happily opens the door behind her which leads to the next treasure chest, containing the Nuku Nuku Fur.
The same three Jellato Sisters are found again in Stage 4-5. After Puchi Ogura #4 freezes Moe, they help lead Starfy to a hot spring in order to thaw Moe out, however the Ukizzu are already in the pool. Starfy proceeds to find the Konbi, who turn into their flame form and help heat up the pool, which forces the Ukizzu to panic and jump out. The Jellato Sisters then throw Moe back into the pool to thaw him out.
The Jellato Sisters' conversation icon in The Legendary Starfy.
Trivia
While there are 6 of them, only 3 are usually around.
In The Legendary Starfy, 3 of the Jellato Sisters are trapped inside of bubbles within a current, and if the player returns to the current they were in after completing the stage it is possible to find the other 3.
A character will appear out of the Chef's Hat (Japanese: シェフのぼう) Accessory that resembles a Jellato Sister minus the heart, if the player blows into the microphone.
A similar angel character appears whenever Starfy or Starly use the Monamu HealSP ability.
In The Legendary Starfy, Moe states that they are hard to tell apart.