Kotetsu grits his teeth, letting out a sound that's something like a growl of frustration. But hen some lingering sense reminds him that the only living target for that frustration right now is Frisk, and so he deliberately tries to reign in his temper, his emotions. He draws in a deep, shuddering breath. When he exhales, it leaves his shoulders slumped a little as a fraction of the tension bleeds out of him. "Why won't you tell me?" he asks, more quietly, his tone carefully neutral in a way that suggests that the only alternative is still a complete and total breakdown.

When they hold out their hand, he stares at them in genuine incomprehension for a moment. Then he follows the line of their gaze to the shovel, and...ah.

The hero's expression grows set and determined once more. He brushes past them to take their spot at the half-dug grave instead. The shovel goes a lot deeper into the ground when he wields it, and piles a lot more dirt out of the way. He doesn't ask before he does this, because a refusal is not the answer he's prepared to hear right now.