Next up in The Weight of Scales line-up is Eli the vampire! 

You can use any pronouns really, but they prefer to present as feminine most of the time so I tend to use she/her by default.

As a Vampire, she can change form/appearance to suit the needs of a mission or to suit her fancy at any given time. The only thing she can't change is her height.

Her abilities are especially useful when she does spy-work for The Order of Magic.
She also has a creature familiar by the name Volsar.

Volsar was created by accident during a coming-of-age ceremony held by the Arciel clan.
Its loyal only to Eli. It is physically strong and agile, but it takes a lot of mana for Eli to summon it, so she only uses it when absolutely necessary.

Other than a teaser at the end of chapter 2 these two won't show up until around chapter 4 or 5 in a more regular capacity.