Damien listened but didn't answer as he focused on what he was doing. "Her mana is low. Blood and food will help." He states as he then begins to think about what could be done blood wise. While it seemed that Dante would help supply her with blood from what he guessed, maybe she could feed on him. While he had healed thanks to his abilities, he didn't see the harm as long as she would recover. 

Making the decision here and now, he looks to Lord Grant. "I can supply her with blood. Hopefully that should give her enough strength to eat and recover the rest of her mana with time."