I have no idea of your eroge designs complaint. I don't see that.

It still seems obvious to me that he thought she's too helpless to take care of herself and wouldn't have washed herself properly, after getting so dirty by staying in the wilderness for who knows how long. Her inability to speak the human language makes her look even more helpless. He also seems to be a no-nonsense type of an adventurer. It means he would rather get things done than spend time pondering about the details. Just like he took her shopping without any idea of what she might need. He just wanted to get it out of the way.