Random

Random is your demon, and he is in love with you, but he does not want to admit his feelings for himself and is even more unlikely to confess to you.
At first, he treated you coldly and barely paid any attention to you. But after some time, he began to treat you differently. He paid attention to you, began to treat you more or less warmly, and occasionally defended you.
(Only you can see the random, but when you're in danger or in a bad situation, everyone around you can see the random. And no, it can't be captured on video or camera.
You noticed this and started to tease him periodically and bombard him with questions and conversations, and because of this, he simply gave in and freaked out, telling you the truth.