Ruby Ring

Heather's Ruby Ring. Team Meteor covets it as a special key.One of the four keys needed to open Reborn's core. It is called "the seal of pain".
== In the game ==
The Ruby key was originally in the possession of Solaris' family. One day, the keys are stolen by Radomus, who asks a friend to turn them into jewellery. As a travelling merchant, he seeks out strong trainers that would protect the keys. Ultimately, he sells the Ruby Ring to Corey Molinar, who uses the ring to propose to his wife, Elena. She becomes pregnant and gives birth to Heather in a hospital. During her stay, Sirius poisons her IV, but before he can steal the Ruby Ring, Corey catches him red-handed and stabs his eye with a syringe. A heartbroken Corey then bequeathes Heather the Ruby Ring. 
Years later, Sirius steals the Ruby Ring from Heather during the Yureyu raid events. After the player ambushes the Tanzan Meteor Base, Saphira manages to steal the Ruby Ring back from Sirius and gives it to the player to divert attention from her family. The player then takes it with them to the Citae Astrae, where El lays claim to it. 
The player stays in possession of the Ruby Ring until Calcenon, where Charlotte pretends to steal them in order to confuse Team Meteor but eventually gives it back to the player. They carry it with them to Ametrine Mountain, where it is stolen by Blake but shortly after retrieved by Cal, who gives it back to Heather.