Conversation so far:
When does Raven (DC Comics) first appear in the comics?
CANNOTANSWER.
What are her special powers?
Raven was free to experience emotions for the first time in her life.
Raven found she was able to not only sense, but control others' emotions.
When did she begin to experience these emotions for the first time?
What happened?
As a result of the defeat of Trigon.
Did she fight that entitiy alone?
The minions of Brother Blood used Raven to control Nightwing (formerly Robin) as part of Blood's plans.
The Titans rescued them both and prevented Brother Blood from returning to power.
DId she began to control others' minds?
She learned to handle this power only after unintentionally making Nightwing believe that he loved her when she thought that she was in love with him.
Did he ever learn the truth about his feeling?
CANNOTANSWER.

Question: Who else's mind did she control?
Self-contained rewrite: Who else's mind did Raven control beside Nightwing?