Fire Emblem: Empty Realms

Fire Emblem: Empty Realms is a game released by Nintendo in 2018 for the iOS.

Prologue 1
The story focuses on Cyril, the prince of the kingdom of Kukiyo. During his childhood, the kingdom split in two and Cyril, unable to bring himself to side with one half of his family, remained in the original castle's place with Serena, his adoptive sister.

Roughly ten years after this event occurred, Cyril receives a letter from both sides of his family, asking him to move to their kingdoms - either Shizuka, the eastern kingdom where his mother resides, or Onsei, the western kingdom where his father resides.

Cyril is unsure of what he should do, imagining the rage of whichever kingdom he doesn't move to. He tries to ask Serena what she thinks, but before she can give her opinion, she notices flames coming from a nearby forest.

Cyril and Serena, alongside Cyril's bodyguard, Vahan, locate a group of ruffians who are robbing from travellers in the forest, either keeping or burning what they steal. This leads to a battle, which Cyril wins.

Prologue 2
Cyril again asks Serena for her opinion. She says that she doesn't mind which kingdom Cyril stays at, so long as he is happy there. Cyril then asks Serena if she promises to come with him to whichever kingdom he stays at, which she does.

Cyril, Serena and Vahan travel along the path leading north and encounter Reinard, a young Ninja. Reinard claims that he saw the mist turn into people who tried to attack him - Vahan thinks that he simply has over-active imagination, although Cyril and Serena both see the truth in his words.