The Dragon Student

Source: Children of the Dragon

The Dragon Student is an unusual patron, as you are the one teaching it. Your power comes from your dragon student, but it is you who helps it harness this awesome power. Technically this power comes from lo, the dragon primordial of creation, who gifted this power as an otherworldly patron. But it's your dragon student who grants it to you directly. This is why you are more warlock than wizard.

You are a Dragon Master, a young student of the Darastrix Academy. At a young age you were bonded with a dragon wyrmling, entrusted to you by its dragon parent.
Even though you are a student, you are a master in your own right to your dragon wyrmling, as you teach it to harness its power. Due to the bonding, your wyrmling shares your drive to learn its dragon magic quickly, at the cost of other aspects of its draconic might being weakened.
Although you are technically a wizard, the bond that you have made with your dragon has granted you access to its awesome dragon magic, but in exchange your own studies towards the arcane have been limited. Moreover, due to your bond you share some of the dragon's temperament, and you are inclined to actively seek out the joy of adventure. Now you and your dragon wyrmling bonded partner go out on adventures, as you seek to put the power of dragon magic into practice, regardless of your young age.
Most Dragon Masters are human, but half dragons have been known to teach siblings. Celestial, gem, and steel dragons don't send their young to become dragon students, due to their secretive nature and strict traditions.
Your magical bond with your dragon companion grants you access to its powerful dragon magic in addition to your own mortal magic. For example, a Bigby's hand would look like a fist when cast by a humanoid, and as a flaming claw when cast by its red dragon student. And even though you still need to study, most of your magical power comes from this bond. As such, Dragon Masters have a saying when it comes to their dragons: You teach me and I teach you.

Gifted Instructor

At 6th level, your firsthand experience with dragon magic has advanced your own studies substantially, and your skill as an instructor has taught your dragon to fly again.

You gain proficiency in Intelligence saving throws. Whenever you make an Intelligence skill check, you can add your Charisma modifier (minimum of 1) to the check.

If you damage creatures with a warlock spell that you cast yourself, then you can choose a number of them equal to your Charisma modifier (minimum of 1). The chosen creatures automatically succeed on their saving throws against it (if any), and suffer no damage from it.

In addition, your dragon gains a flying speed of 30 feet.