Lacrima is a cheeky fox demon, who usually ends up getting into trouble.
She sees Lord Serpens as her 'most beloved master' and serves him loyaly as 'Royal Dog'.

Bio:
Lacrima is an ex-patient of Michael. Since she had been a child he had manipulated her and as she found out about it, her love for him grew into hate. In rage she set his city into flames, but fainted before she could reach his asylum.
The next she remembers is waking up in Serpens castle where she make a contract with him. He will give her life a new sense and she will serve him eternally.