Neville & Hermione
Justin had been so sure that Hermione would be able to get it out of Neville if he wasn't taking care of himself, but the more she thought about it, the less she was inclined to believe it. Neville prided himself on being strong, on holding himself to an incredibly high standard of independence and self-reliance. Both of them did, but... there wasn't as much weight on her shoulders, not by a long shot, and she knew she couldn't properly relate or understand what he was going through.
Of course, then he said that, and all thoughts of concern went out the window as her eyes went wide. "Wha-- Neville! I'm your-- I don't know, partner? second-in-command? Either way, you should tell me! If you can't tell me, whom would you be able to tell?"