[Regardless of skill, when you're fighting, there's always some risks involved. No matter how many perfect battles you fight, there will always be times when your enemies surprise you. There's not always enough time to react. Anyone who's fought a decent number of battles knows that.
By the time Richter realized what was happening, it was too late to stop it; the dog-like creature had caught Emil from behind. Even though Richter called out to him-- there just wasn't enough time.
It wasn't anyone's fault, but that didn't stop Richter from feeling frustrated as his powerlessness shows. Two powerful strikes later, the beast falls, but the damage has already been done. Despite the fact that Emil's still standing... that he's doing his best to be brave, Richter still feels this ugly pain in his chest. Seeing him hurt scared him, deep down, and brought to the corners of his mind things he didn't want to think about. Complicated, painful things.]
Come here, we need to fix that.
[There was no questioning it- they needed to stop again. Even though it would slow them down, the older man didn't care. Any attempts to argue it would be met with zero tolerance.]