The doctor’s name was originally going to be Dr. Sanders because he looks a bit like Col. Sanders of Kentucky Fried Chicken fame. But I remembered the TV show Scrubs had a similar character named Colonel Doctor, so instead he became Dr. Nursen.
Even though Tak and Hakata are roommates they haven’t taken the time to get to know each other. Partially because Hakata enrolled mid-semester and tried to keep his past a secret, an also because Tak is a a spoiled crankypants who got used to having the dorm room to himself.
Normally when a person gives someone a heart, they could give it back. But Tak saw Thalia munch his hearts into crumbs, so they’re gone for good.