Sigma raises his eyebrows and recoils at once - the pin has not been pulled, but the implication stuns him. He has seen enough of explosive objects to last him a lifetime. But then realization sobers him, and Sigma puts a skeletal finger to his lips. Was she implying what he thought she was? He is silent a long moment. Thinking of Homura dying alone with a grenade to her heart made him too sad, as acutely aware as he was that she could not be allowed to win.

"...You realize I cannot allow you to do that alone."