Sumeragi

Sumeragi (スメラギ) is a character from Fire Emblem Fates. He is voiced by Taketora in the Japanese version.

Profile
Sumeragi is the deceased king of Hoshido. He is father of Ryoma, Hinoka, Takumi, and Sakura through his first wife Ikona, and the stepfather of the Avatar by marrying Mikoto.

Prior to the events of Fates, Garon called Sumeragi to Cheve to discuss negotiation terms due to the war between Hoshido and Nohr. Sumeragi took the infant Avatar with them, believing that Garon was willing to end the war. When he arrived, Garon revealed to him that it was a trap and ordered his soldiers to attack them. Sumeragi sacrificed himself so that the Avatar would be protected from the barrage of arrows. Sometime after his death, Anankos revived him as his puppet.

All Routes
In Chapter 5, Sumeragi appears as a hooded man, drawing the Avatar's Ganglari to him in an attempt to kill the Avatar. First, he uses the sword to explode the nearby area, killing many innocent civilians. He then focuses the sword on the Avatar, hurling shards of metal at them before Mikoto protects them at the cost of her own life. Ryoma notices the hooded man and attacks him. Due to Mikoto's sacrifice, he calls for several of his soldiers to help finish the job. He is defeated by an enraged Avatar and seemingly disappears for the rest of the game.

Revelation
Sumeragi reappears in Chapter 25. Initially hooded, he reveals his true identity before the Avatar, Azura, Gunter, and Ryoma. After being defeated, he speaks with his family before fading away.

Invisible History
Sumeragi serves as the boss of the first part, where it's revealed he has been leading Valla troops to hunt down and kill the heart of Anankos. He is defeated by Odin, Lazlow, and Selena forcing him to retreat.

Chapter 5 - Mother

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Revelation Chapter 25 - The Return of the Demon Swordsman

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Xenologue 7 - Hidden Truth 1

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Battle Quotes
"Show me...what you got. Heh. Heh. Heh..."

- Sumeragi's (under the name "???") pre-battle quote

Ryoma: Vengeance will be mine... Prepare to die!

???: Heh. Heh. Heh...

Vs. Ryoma
Sumeragi: Ryoma...my eldest son...My pride...I hunger for the glory of a battle between us. I expect nothing less than your best-you will be getting mine!

Ryoma: My father...was a respectable man, a just king, and a true samurai. You, fueled by a lust for battle and glory, are not that man. I will destroy you for pretending to be him!

Death Quotes
"Urgh... Not bad. Heh. Heh. Heh..."

- Sumeragi's (under the name "???") defeat quote

Etymology
Sumeragi (皇) can translate as "emperor".

If the character of Sumeragi is broken up, it can be read as 白王 which translate as "White King".