Conversation so far:
What is the first life of Raven?
Raven is a Cambion; half-human/half-demon daughter of interdimensional demon Trigon and Gotham City–born human Angela Roth (known as Arella). Raven was conceived as the result of Trigon's marriage to Arella.
What was Raven's home Azarath like?
Raven grew up in an alternate dimension called Azarath with pacifistic inhabitants whose spiritual leader was the mystic Azar (Pagon).

Question: Why did she have to control her emotions?
Self-contained rewrite: Why did Raven have to control her emotions?