The way i see it, she wants to help from afar and avoid being close to him. Because his father can use the eye of truth to get information out of the ML. If the ML were to know that she is a ritiom or get close to her. The father will also be aware of her existence. Since, the father is kind of controlling him.
I thought he didn’t know fL is the ritiom. All he knows is fl’s brother has met a ritiom (since when fl’s brother met the ML’s father, the ml’s father noticed some of the fl’s brother dark energy was cleared) which is why he sent heinrika to FL’s castle/home but henrikka lied and said he couldn’t find the ritiom.
I don't understand why Triche doesn't want him to know she was the person in the mirror/lake (?) She is already friends with like most of the mfs