(Slightly forcefully) "Let's see... I'm Mahiru Koizumi. I'll be counting on you from now on." 

(condescending) "Sorry to disappoint you, but I've already made a mental note to remember you as "Unreliable Hajime". It's gonna be tough for you to change my mind. You better man up and try even harder to do your best!" 

(Foreboding) "I don't like it either but...we won't survive...if we don't go through with it."