At the comment about the Shredder, Raphael didn't offer any comment but he did exaggeratedly roll his eyes before smirking slightly.

When Donatello leaned in, Raphael shifted closer and listened with a keen expression - in his case, frowning slightly. This was...a lot more than he was expecting for an answer and it was a lot to absorb. The letter had touched on some things - like some sort of event that had happened, and that keeping in physical contact was key to helping with this 'power problem'. However all this stuff about a resistance group and this Zeloph guy was new. Raphael finished his food while Donatello was talking and when his brother finished he crossed his arms.

"So lemme get this straight. This Zeloph guy is the leader of some resistance group who happen to be a race of people that use magic mumbo jumbo stuff to beat this miasma thing? And that girl is his sister?" He glanced at the one identified as Rhea at her desk. "Why the heck don't she do nothin'? Like...why is the city so intent on keepin' these people out when they obviously can beat this thing?" He shrugged, incredulous.

"As far as this infiltration thing goes though I am so in." He grinned again. "Sounds like fun."