|Origin||Darkness and Light|
|Age||16 (Shining Moon)|
|Home World||Radiant Garden|
|Family||Yami Dark (Father)|
Blaid Dark (Paternal Grandfather)
Ulmia Dark (Paternal Grandmother)
Kurai Dark (Uncle)
|Weapon||Keyblade (Kingdom Key, Kingdom Key D, Way to the Dawn)|
- "Stay away from my mother! I'll kill you if you take another step!"
- —Tsuki warding of Yami
Tsuki is a main character in Darkness and Light, and the main protagonist of the 4th story arc.
Tsuki has a strong resemblance to his father, having a similar build and facial features. He has green eyes of a lighter shade than his mother's, long dark red hair that extends to his shoulders and long bangs that obscure his face. He wears a white short sleeved shirt with a black over shirt with blue jeans with black sneakers.
- Kingdom Key - Tsuki's original Keyblade wielding while he was training to become a Keyblade Master. Once he was sunk into the Darkness by Blaid in an attempt to kill him he lost the ability to summon it.
- Kingdom Key D - Tsuki's second Keyblade. After losing the ability to summon Kingdom Key, Tsuki was granted its dark counterpart by the Realm of Darkness.
- Way to the Dawn - After embracing both Darkness and Light Tsuki gains the ability to summon a Keyblade that reflects his duality, the Way to the Dawn. It replaces Kingdom Key and Kingdom Key D, and is the weapon he carries into the final battle against the Dark Empire.
- Tsuki is the only character in Darkness and Light who can naturally wield both Darkness and Light in tandem. This is further expressed at the end of the 5th Story Arc when he becomes both a Keyblade Master and a Dark Keyblade Master.
- As he is never refered to by his full name, it isn't known whether he inherited his father's surname (Dark) or his mother's (Hime).