Yeah, Reimu is totally a tsundere for Youkai. It's not like she doesn't seal and doesn't exterminate them because she likes them, she's just too lazy to finish the job....
We found you!Oh my, welcome you two.Happy new year.Thank you very much.It's not like I came here because I wanted to.There's just plenty of free time at the shrine...!Oh my, Reimu-san...you're a tsundere, aren't you?Why do you know such words!?
And I'm not a tsundere.