As the Sailor Crystal of the only Sailor Senshi to ever rival Sailor Moon at full power, the Sapphire Crystal is among the strongest Sailor Crystals in all of the galaxy. As said in the manga, it is the ultimate force of destruction and supplies Galaxia with vast destructive abilities and enough power to easily battle Sailor Moon.
- In the anime version of Sailor Moon Sailor Stars, it's revealed that Chibi Chibi is Sailor Galaxia's Star Seed that she sent away in order to protect it from Chaos' corruption and find someone who will accept it as the new host. In its crystal form it has a crimson-red colored appearance.
- The Sapphire Crystal is sometimes translated as the "Saffer Crystal" and the "Sapphire Crystal". The Kodansha translation uses the latter name.