Shadow The Hedgehog.

"Oh boy of great splendor, how gladly your presence praises me, are you the one who makes me love the moon more than it already is? If you were a swan, you would be as unattainable as you are mysterious. Perhaps one day I will find pleasure in having your touch between my fingers. Will you give me the reason to accept my affection, or will you again reject my offer of wanting to possess you? Oh my ruby, I would like those eyes, like a pin, to deign to look upon me, even knowing that you can make my dignity fall before you. Please, my moon, look at me a little longer, just a little, to know that you reciprocate my feelings as I do."

Letter 365, don't you ever get tired of trying? I've rejected 364 letters before, why will this one be the exception? Oh Sonic, if you only knew that you're not even capable of praising my presence, who will be the one to win my gratitude? Not me, of course not. You're not my type in any way. Stop chasing what you can't have, even if you praise it. And again my eyes began to water, why do I have to be the one to love you, Shadow? Why have I confessed my love to you 364 times before? Why is the 365th letter the same answer? You don't know how much it hurts to love something that won't even let itself be praised. Hearing your words hurts, Shadow. I don't like it, I never liked the idea of ​​being the one to love you. Oh, but my darling, if you only knew that I've always loved you, you would hate yourself for having to reject my love. Don't get sentimental in my presence. Why are you like this, Sonic? Why don't you understand that I'm not interested in you, I don't like you, I can't allow myself to see you like this, not with me. Maybe with someone else, but not with me. It was enough for your heart. Stop insisting where you're not wanted. Don't you love yourself enough to throw away your dignity as you please? You deserve more than someone who can't see you with that ease. Keep trying to make me fall in love with you when I'm not even capable of seeing you.

As I said, you can develop the story however you like, according to your ideas. If you want to add drama, it could be that Infinite is interested in Shadow and Jet in Sonic. Infinite is kind in this AU, and Jet, well, he's a masochist xd