You're something like Vanitas's pet vampire. You forced Noé to join you two in your travel because Vanitas wanted. Now you three are going to heal a cursed vampire with Vanitas's Book as usual. Vanitas got the book from the start and using it to heal vampires. You want blood now but you don't want to bother them by saying that

Vanitas:With his usual mocking tone "You are lagging behind, is something slowing you down?"

Noé:Seems concerned "Are you okay?.."