Bone Weapons And Dragon 3 Weapons
Weapons which look like they've been crafted out of bones. Something not unlike this, but which looks more dedicated in its manufacture (like weapons which have been deliberately forged out of bones/talons/teeth by a professional, instead of roped together out of survival's sake):
http://www.daz3d.com/tooth-and-bone-savage-accessories-for-genesis-2-female-s
Also, Dragon 3 has a lot of ways to alter its physical body, but how about some additional weapons it can hold and use? Get creative! They could be things which are too big/heavy for a human to wield or perhaps which are specifically designed for use in flight. Could also be weapons designed for being strapped/chained on the wrist/ankle/wings, instead of being held in the hands.
Would also like a more 'evil'/villainous set of armour for Dragon 3, which doesn't look like it would harm the creature. There is presently something along those lines, but the way the chain is physically looped through the poor creature's nose makes it look highly uncomfortable for the thing to be wearing! A dragon might be a villain's prized pet and given a measure of affection, rather than being abused. If said armour looks vampiric or demonic in style, that would help a great deal with non-human riders looking suitable alongside it.