u/Consistent_Peak748

There’s a brother and sister from a small royal family/nation where members of the royal bloodline can summon demons.

At one point, the siblings are kidnapped by bandits, and the MC rescues them. Later, it’s revealed that the brother and sister can summon demons whenever their lives are in danger.

The first time they summoned demons was when they were around 5 years old. Apparently, they were trying to kill each other, and the extreme danger triggered the summoning.

Later in the story, the siblings are captured again by their own personal knight, who is secretly working for an enemy nation. The knight forces them to wear some kind of slave-control collar/item and orders them to summon demons to kill the MC.

However, by that point, the siblings have learned how to summon the demons willingly, so they destroy the slave collar/item and kill the knight instead.

I also vaguely remember a later scene where the MC urgently travels to another region by ship, and the ship is being pulled through the sea by giant seahorse-like creatures (or something similar).

Does anyone know what anime this is?

UPDATE: I found it. The scene is from the manga version of Reincarnated as a Sword, starting around chapter 54.

Thank you to everyone who helped me find it. I really appreciate it.

There’s a brother and sister from a small royal family/nation where members of the royal bloodline can summon demons.

At one point, the siblings are kidnapped by bandits, and the MC rescues them. Later, it’s revealed that the brother and sister can summon demons whenever their lives are in danger.

The first time they summoned demons was when they were around 5 years old. Apparently, they were trying to kill each other, and the extreme danger triggered the summoning.

Later in the story, the siblings are captured again by their own personal knight, who is secretly working for an enemy nation. The knight forces them to wear some kind of slave-control collar/item and orders them to summon demons to kill the MC.

However, by that point, the siblings have learned how to summon the demons willingly, so they destroy the slave collar/item and kill the knight instead.

I also vaguely remember a later scene where the MC urgently travels to another region by ship, and the ship is being pulled through the sea by giant seahorse-like creatures (or something similar).

Does anyone know what anime this is?

UPDATE: I found it. The scene is from the manga version of Reincarnated as a Sword, starting around chapter 54.

Thank you to everyone who helped me find it. I really appreciate it.

There’s a brother and sister from a small royal family/nation where members of the royal bloodline can summon demons.

At one point, the siblings are kidnapped by bandits, and the MC rescues them. Later, it’s revealed that the brother and sister can summon demons whenever their lives are in danger.

The first time they summoned demons was when they were around 5 years old. Apparently, they were trying to kill each other, and the extreme danger triggered the summoning.

Later in the story, the siblings are captured again by their own personal knight, who is secretly working for an enemy nation. The knight forces them to wear some kind of slave-control collar/item and orders them to summon demons to kill the MC.

However, by that point, the siblings have learned how to summon the demons willingly, so they destroy the slave collar/item and kill the knight instead.

I also vaguely remember a later scene where the MC urgently travels to another region by ship, and the ship is being pulled through the sea by giant seahorse-like creatures (or something similar).

Does anyone know what anime this is?

UPDATE: I found it. The scene is from the manga version of Reincarnated as a Sword, starting around chapter 54.

Thank you to everyone who helped me find it. I really appreciate it.