Rin

Background
Always hanging around His Highness. In charge of his well-being, bathing him and keeping him groomed. She is his Game tactician, the brains of the group.

Appearance
The dagger sheathes are secured onto her dress, allowing her to have easy access to her weapons when she needs to defend or attack others.

Personality
She has much confidence in her strategies and can easily see through bluffs. In front of others, she pretends to be a young girl who follows her master, His Highness as a trader. Behind others, she very much follows him around most of the time unless she needs to get in contact with other Demon Lords  in preparation for an attack.

Relationships
Highness- nothing much is known other than the fact that she serves him dutifully for his every needs

Jin Russell, Sandora- They played for a day, touring the North.

Sandora- She got close and befriended Sandora only to betray her and leave a gap to be made use of later in the battles.

Felicia Raisa- They fought once and found that their Gifts were incompatible. Since neither of them would win nor lose.

Plot
First appearance in Volume 3, she started the game of the dragon's attack on Underwood.

Volume 6, she recruited Demon King of Confusion to her sub-group faction.

And finally at Volume 7, she started the plan of the war against the North just to distract them as she did another task.

Gift
Manipulation of Distances.

Trivia
She looks so innocent. But it is to be expected since the most pure people who chase after a single goal without caring about others can be a little extreme in their actions.