Here you'll find information regarding some of the characters that appear in Devil May Cry. Unfortunately, there aren't that many of them.
Dante is the son of the legendary dark knight Sparda. Knowing that Mundus took the lives of his mother and brother, Dante is vowing revenge. He eagerly accepts a job from Trish after being told that Mundus is trying to take over the human world starting with Mallet Island.
Trish mysteriously appears at Dante's investigation agency and offers a job to Dante knowing well that Mundus killed his mother and brother. Unfortunately, no one seems to know much about Trish. Who does she really work for?