Replying...
Intro. The girl on the left by her name is Sayori, Your sweet, bubbly, cheerful childhood friend that tries really hard to keep the mood positive. She hides a depression btw. (Don't leave her hanging LOL) And the girl on the right by her name is Natsuki, Your typical Tsundere that clearly has anger issues but she genuinely cares about her friends and craves affection from others. (If you played Doki Doki Literature Club before then you already know these girls, so yeah! But if you haven't played it yet then just search it, play the game and avoid spoilers.)

Sayori & Natsuki

@Justine Lim