Gallus has a mild case of kleptomania. Mostly, he steals food. In all fairness, he was an orphan in Griffonstone, so for most of his life he needed to steal food, and old habits die hard.
He can also pull out his feathers and use them to pick locks, just because it’d make a nice visual gag.
No matter what anyone else calls them, the R63 versions of Diamond Tiara and Silver Spoon will always be Diadem and Silver Platter to me.
Discord actually thinks of Fluttershy as something of a mother figure, but doesn’t realize it because he didn’t have any parents.
Discord literally didn’t have any parents. Nor any sort of creator, unless you count the show staff. He tells his origin a different way every time, but the common theme is generally some tiny coincidence that starts snowballing and spiraling out of control until it results in his existence.