I like how confident and sure of herself she is. She's quite literally listed as being extremely confident in her own abilities and we see her being smug and boasting a few times and it makes her really endearing to me. I feel like after going to Gensokyo and getting out of the outside world which didn't like her she finally has the capability to be confident and proud of herself. She SHOULD be smug and unashamed to say how cool she is, it's deserved