Crysta Snowpigeon's white pigeon-like name and her neat and clean appearance symbolises peace but her tastes are far off from peaceful or gentle. She freezes what she likes and stores them in her collection. The number one things she wants to freeze the most are Nightmare and Alice. She is able to switch her appearence between a child and an adult at will.
Whether Crysta is actually a child or adult is uncertain; however, her selfish and often rash behavior, as well as her love of playing pranks, imply that she is indeed a child. She strongly dislikes work and will find ways to skip out of it, and when Sidney manages to get her actually DO her work, she often complains. Overall she's very cheerful, and she loves cute things, especially rabbits. She has been known to dress Alice in a bunny outfit like Sidney's simply because she wants another rabbit around. Crysta gets lonely easily, and when she believes someone is going to leave her, she freezes them to keep them around - she can freeze anything instantly, even people, and she adores her collection of frozen things.
Crysta can appear as both a child and an adult. She has light silver hair and always wears a yellow lily behind her left ear. Her eyes are light yellow-green. As an adult she has a very mature body and possibly is unaware of it; she has been seen squishing Alice into her chest. As an adult, she has light silver long hair but as a child, she has light silver short hair up to the bottom of her ears. [Source: wikia]
You can download this papercraft toy here: Heart no Kuni no Alice - Chibi Crysta Snowpigeon Free Paper Toy Download [Instruction]