Name: Callum

Alias: Kamen rider Saga, Your Highness, Vampire Monster, Asshole king, Kamen rider Dark Kiva II

Age: Unknown 

Rider Type: Antagonist, Villains, King

Looks:

Gender: Male

Story Series: Kamen rider Kiva x Kimetsu no Yaiba - The Bloody Dark Moon

Species: Fangire

Affilation: Fangire Kingdom Realm

Occupation: King

Family:
Grandfather: First Fangire King/Kamen rider Kiva (Deceased) 
Father: King of Fangire II (Deceased)
Mother: Queen Mary (Unknown)
Half brother: (Y/N) Kamado/Kamen rider Kiva (Alive) 

Likes: Killing everyone stand to his way, his people, finding the power of Dark Kiva, creating the people, no mercy on humans and the monsters clans, his partner Sagarc, killing his half brother (Y/N), taunting on Muzan, love his mother

Dislikes: Humans, Peace Alliances Forces, Demons of Muzans, Monster Clans Kingdom, his half brother (Y/N), losing the fight, traitor

Personality: Cold, serious, cruelty, bloodlust, ruthless, arrogant, intelligent, mastermind, powerful.

Personal Info: Callum was the son of King and Queen Mary and the grandson of First Kiva, after his grandfather was betrays by his father take over the kingdoms. When he was 2 after his father was defeated by (Y/N)'s father alongside with (Y/N) from the future. And so his mother left him and raised (Y/N) by her own and she care about more on (Y/N). Making Callum to be jealous and vows to destroyed on Humans and Monster Clans to followed his father footsteep.

Riders Form:

Kamen Rider Saga

Weapons

Death Blade - Belong to his father now belong to him.

Quotes:

'People of Fangires, hear me! My brother has come from the human world... to challenge me for the throne! Let us settle this in the ancient way: by bloodshed do the gods make known their will!'

'You wield our mother's sword. Powerful, but flawed. Like her. I wield my father's, and it has never known defeat!'

'Today, we shall prepared for our armies and tomorrow we're shall attack on the humanity! RISE FANGIRES!!!'

'Unforgivable!'

'The Sword doesn't change what you are! You're a half-breed bastard! Fangire will never accept you as its king!'

End info