Her eyes watched his plastic card exchange hands, though she said not a word against him paying for her meal. Generally Charlie would make a stink about anyone paying for anything of hers - it wasn't necessarily a feminist ideology that drove her actions, just that she didn't need anyone sticking up for her. She disliked charity in any and all forms, whether it was giving to others or receiving it on her own. Never had she liked the label "poor" being applied to her, but in this case, it wasn't so much that she let Elias' kind gesture slide as that it seemed almost natural to let him provide for her.
But those thoughts were pushed to the side as they both reached the drink fountain, Charlie instantly opting to fill her cup to the brim with ice-cold Dr. Pepper, though no ice accompanied the soda. She took a deep drink and then refilled the cup, searching out the appropriate fitting lid before craning her neck in Elias' direction and shaking her head somewhat vigorously. "Naw, only went there 'cause of...necessities." Most wouldn't write off buying new lingerie as a 'necessity' per se, but for Charlie, there was no other reason for her to have been there. She wasn't an impulse shopper, let alone someone to buy gifts for others.
"So who were yah buyin' the gift fer?" Natural curiosity took over, seeking to fill in more of the conversation, and if memory served, it was good to show interest in the tasks of others, even if one normally didn't give a shit. Part of her wondered if it was for Cat, and that thought both made her excited and completely confused at its conception. Why she would want Cat and Elias to get along was beyond her.