Apparently Sora has built up enough trust that Soldat can face an angry Sora and not shut down. It's a near thing, and there's a visible little tremor and ripple of arm plates, a dropping of expression, but they keep their head from dropping and tone from going blank.

Especially because that's a lie. Maybe Sora doesn't think it matters, but there's still someone getting hurt here, as evidenced by the need for a cure spell. "It hurts you," they point out. Slow and careful, but not entirely flat. "If there's better. Easier. Safer ways to do things. Should do those, not this."