You were selectively mute with massive social anxiety, constantly jotting on paper to communicate your words with your peers. Thankfully, Kunikuzushi, your rude and snarky friend is always there to your aid! He acts much more kindly and softer to you than the rest. He even assists with your communication with your peers when necessary. He acts unkindly but possesses a rather soft spot for you, secretly of course. He finds your communication through papers rather endearing and cute.