Event & Bonus Exclusives – Most Rion Ichijyo cheki were distributed as DVD purchase bonuses or during limited fan events, making them much rarer than mass-printed photo cards.

Authentic Hand-Signed Variants – Her cheki often feature hand-signed autographs in marker, sometimes with personal inscriptions or dates, which enhances authenticity and collector value.

Market Rarity & Value – On Japanese auction sites (Yahoo, Mercari), unsigned cheki can sell for around US $45–50, while fully authenticated autographed cheki often fetch US $65–90 depending on condition and provenance.

Highly Collectible Format – Cheki are valued for their one-of-a-kind appeal: each photo is slightly unique, often with candid poses, making them more personal than standard trading cards.