From Final Fantasy Wiki

Chelinka
Artwork by Toshiyuki Itahana.
Sprite(s)
Kana	チェリンカ
Romaji	Cherinka
Age	12
Voice Actor(s) (Japanese)	Nami Kurokawa
Voice Actor(s) (English)	[[Wikipedia:|]]
Tribe	Clavat
Home	Villa
Crystal Chronicles: Ring of Fates character

Chelinka is a Clavat girl from Final Fantasy Crystal Chronicles: Ring of Fates who is Yuri's older twin sister. This spirited and determined lass combines a strong sense of justice with a softer, sensitive side. While she may flaunt her status as elder sibling, she actually finds the role as intimidating as she has a fear of ghosts. Chelinka also possesses a special crystal that shines only when it is her hands, giving her and Yuri the ability to perform magic. After seeing their father murdered, Chelinka was unable to speak, communicating telepathically until Yuri is near death at Rela Cyel after tapping into her powers.

Artwork of younger Chelinka.

Chelinka is not technically able to play in Story mode but in Multiplayer mode you can choose to be a female Clavat and their default appearance is Chelinka. However, story-wise, Yuri and Chelinka cast magic together, and when Yuri does so in Story mode, Chelinka is presumably assisting him.

If you play multiplayer on your own, you can talk to Chelinka and Yuri. They talk about Yuri's cooking. Al walks in and it is obvious that Gnash had visited by the fact that the is a an arrow taro on his head.