My Willow Hall series has some evil characters who were sexually abusive and a couple of female characters who were abused. Oxford Cottage touches on Regency sex trafficking. Addie: To Wager on Her Future has an animal that is killed. For Peace of Mind has a child that is harmed by a bad guy. I’m not sure what other things would need trigger warning. When I write an evil character, they can be just that evil. However, evil never wins. Love always triumphs.