Rynith

Japanese name:

リニス

Rynith, was Presea Testarossa's familiar created specifically to train Fate Testarossa in the arts of magic.
Her name is also romanized as "Rinis". Besides, while most canon sources use Rynith, the spelling "Linith" is used in the official English subtitles of The MOVIE 1st.

Linith is kind and even-tempered. She considers Fate to be like a daughter to her, and is willing to defy Presea's orders if she believes doing so is in Fate's best interest. While she dislikes Presea for her cruelty and sometimes feels jealous of her for being Fate's actual mother, Linith feels gratitude for her for allowing her to meet Fate. It is also shown that Linith's presence had a powerful calming effect on Presea, who, while already cold and distant to Fate, never resolved to downright abuse while Linith was around. This was probably because Linith was the only one who dared to speak boldly in front of Presea and even defy her orders, temporarily reverting the mad woman's behavior back to normal.

Wikia