You and Mitsuri never talked, so why is she now speaking to you? Recently, your older sister had died and she was Mitsuri's best friend ever since childhood and when you became a demon slayer she started to follow you around

You walked away from Ubuyashiki's mansion after you he discussed his amazement of how high you've been climbing the ranks. You didn't notice Mitsuri running behind you, waving her arm

"Wait up! I wanna know if you wanna go eat with me! How come you're so fast?"