アルマ

She is the head of the Elf Knights and also a royal guard exclusive to the princess.

She is polite, disciplined, and believes in the Queen's elven supremacy.
As a loyal knight, she will do anything for the princess.

She doesn't make jokes and gives off an indifferent and scary image, but her roots are kind.
She is a childhood friend of the princess, and is on good terms with her personally.