Jean Grey, Rogue, & Open
Rogue couldn't believe it. She, among other X-Men, stood behind Xavier and felt the strength and hope in his words. He was cut off mid-sentence and it was like a lot of what Rogue made sense of the world suddenly didn't. The spray of blood from the blow splashed onto her and she blinked a few times to process what she just saw. Jean had the strength to move forward and Rogue could tell from the way that Jean hovered over Xavier's body but didn't call for an evacuation that it was over and they never even got a chance to try to save him. Chaos erupted around them as frightened people pushed their way toward doors.
Xavier was a father-figure to pretty much everyone on the X-Men. He saved a lot of them from their own powers and from themselves. Rogue wouldn't be here if it weren't for him. She'd still be rotting in a cell at SHIELD and losing herself to Carol's mind if she hadn't completely lost herself yet.
"NO!" Rogue heard someone shout and then realized it was her own voice. She was emotional and she needed to calm down but she couldn't find the strength to. She wanted to find whoever did this and make them pay. The heat of her rage made her rise from the ground slowly, "Ah'm gonna find'em! Ah'm gonna find'em and then Ah'm gonna—" she cut her own words off. Her eyes burned like the anger inside.