Being a ninja in his previous life, he had some rules he had to cherish more than his life. One of such codes was that the life of his client was the top priority. That's what every ninja in the village followed. Somehow or another it seems Klautz unconsciously considered Dant to be his client and took action to protect him from the beast by instinct, even though he never intended to do so.
"To do such a mistake after I have come so far. Welp, now that I gave away my location, I better fight this beast."
[Flashback]
"Congratulations to be promoted to a C rank ninja. You can do client based missions from now on." The lady smiled as she passed onto a card to Klautz. She was wearing a white outfit that ran upto the top of her breasts leaving her shoulder blades bare. One could see her chain armor over her skin and those very blades.
