YUHI
Sumire always talks about how she isn't a good person. But how can that be? The world has been terrible to her, but instead of taking revenge, she continues to help people. She continues trying to understand them even though she doesn't have to. There are some people who are beyond understanding after all. People who hate others for no reason.
"When we met in the sixth life, you were frantically searching for Lucifer. You even cried when you realized the bond between you two was broken, those tears weren't a lie." Yuhi pointed out.
Her tears and attachment to Lucifer were too real. When she was explaining the story with him and Mashima the other day. Yuhi already knew that she fell for Lennon. If so, her reaction in the sixth and seventh life doesn't make sense.