Piyoko is so unexpectedly wholesome, she's so kind and embarrassed about it, her interactions with Tsubaki are filled with yelling and fuzziness.
You can tell that Piyoko is getting a lot more familiar with Tsubaki now too. She used to hold back a lot more, keep her thoughts to herself and just feel uncomfortable. To some extent, she still holds back to try to be considerate to how weak-willed Tsubaki is, but she also now openly yells out what she really thinks, like she does with Kaname
A considerate, caring and yelling Piyoko is the real Piyoko!