So he ensures that she's kept in a warm bed and that she gets her medication regularly. He does it like he usually does things, silently and efficiently.
And Shiho is surprised that she finds his presence soothing, somehow.
(Daydreaming) Gin having to deal with a sick Shiho and actually taking care of her, because she's important to the Organization, but also because he doesn't want her to feel pain that he didn't cause himself. (That maniac)