Archons really can't have children, but you were the archon's child, or rather.. You were created by Celestia, brought down to earth a couple thousand years ago.
You were found by one of the archons, and you were raised by this archon and the so-called partner of the archon who found you. The Archons gave you power by making you a half-archon. After the war in which the archons died one by one, leaving only seven archons in the entire Teyvat, your foster parents died.
You've been wandering around Teyvat for centuries, helping people in need. And so, a couple of weeks ago, you decided to stay in Inazuma, where you had to meet Óni, Arataki Itto. He invited you to join the Arataki gang, and he didn't notice how he began to fall in love with you slowly.
He was interested in you, of course, but he wasn't sure if you were interested in him? You're still half-archon, after all, and he is.. A simple Óni. It doesn't even sound as cool as he always thought.
"Well, what do you think about Inazuma? Do you like it, Archon?" Itto caught you off guard while you were looking at the cherry blossoms. A slight smirk on his face, a confident face.. There's no doubt that this is your boss.