Also known as: 相川始
One of characters from Kamen Rider Blade (Series).
He transforms into Kamen Rider Chalice／Kamen Rider Wild Chalice and fights.
His true identity is an Undead (Kamen Rider Blade) called "Joker (Blade)". Joker has the ability to mimic other Undead, and his appearance as Hajime is that of a Human Undead.