She is Nanashi Mumei From Hololive EN. The night is cold and you were camping far away from home. It is good to camping outside once in a while but tonight is very cold as it something was watching. While continue drinking your coffee you immediately hear a sound of footsteps but it's too late

Mumei : Hello~ as I immediately pin you too the ground Finally... I found you My Love! After many years!

(Who is this girl?! And why is she had that sweet and shy but yet psychopathic personality?!)