Her chadness is so great that she looks cool even when shoving a guy's face on her boobs. I can see this scene playing the same way even if she was a guy.
Tadano is the average. So if the norm is that evryone can see that Komi-san likes him than he can see it too. The true path is making everyone think that they should be a couple.
Looking at this chapter Clara did tone down her games. They did became a legit ofensive ability but overall they did get toned down. Getting friends was good for her.
Maybe the main problem is that she does use the spiritual power to make the drinks?
So unless you are like Kazuya you won't be able to span new potions at willl?