So here's the good dragon boy, he's grown up into a young adult here. He's a traveler and a gem hunter, and most gems he finds he either collects, eats, or sells.
Like I had mentioned in Twilight's ref, Spike is her adopted son (though they aren't that far apart in age), so him and Twilight's biological son, Penumbra, are brothers.
He always carries his shoulder bag with him, which holds the gems he gets, plus some items he likes to keep with him. These items include a bag of bits; his "Official Gemhunter's Guide"; a photo of him, Twi, and (12 y.o) Pen; and his apron
Like stated, he breathes magical green fire, and has the rare ability to send letters with it- and can later receive them as well by burping a quick burst of flame as the scroll appears.
He's definitely not as strong as dragons who grew up in the Dragon Lands, but his strength is definitely there, his legs and jaw being the most powerful things about him
He also currently has a girlfriend- which is Gabby the Griffon