Charlotte stopped trying to stuff her belongings into her bag, taking a moment to decide if it would be rude of her to dive under the table. Thinking better of it, she looked up at Mark and blurted out the first thing that came to mind, "My aunt had a blind cat once, he got hit by a car." Her eyes got huge and she slammed her hand over her mouth. Way to put your foot in your mouth, Char she scolded herself. "Not that you have to worry about cars here, so you're completely safe!" The more she opened her mouth, the worse it got. She sat down and put her head on the desk, meekly saying: "Sorry, I don't know when to stop talking, its a curse."
A car would have been a better reason than the real reason for his blindness, not that he cared to share that information. He let it go, grabbed his things and headed over to the table. The cover was still readable to those with sight but he'd put a spell on the book to translate the paged into braille, Taking a seat he simply nodded.
"Given the half blood contention around this school at the moment I wouldn't mention a muggle mode for transportation." He kindly reminded, making it clear while he was fine with it, someone in the library might target her.
He cleared his throat.
"Now, What's the subject we are working on?" He asked, putting the potion book in his bag, remembering his manners he bowed slightly. "Mark Green, pleasure." He said.
"Shocked to see you and someone out of your house being pleasant." He said to Yukiko.