After the Avatar is brought back to Hoshido, they are reunited with their birth mother, Mikoto, and their blood siblings, the Hoshido royal family. This joyous occasion prompts Mikoto to announce to the Hoshidan people of their return. At Shirasagi Castle Town, as she introduces them, a hooded man pulls the Avatar's Ganglari and uses it to induce a large explosion, killing numerous Hoshidan civilians and destroying the town square. He then uses shards from the blade to attack the Avatar, but Mikoto jumps in the way and takes the attack. As the Avatar holds their mother, she dies in their arms, causing them to awaken their Dragon blood out of grief. Lost to their rage, the Avatar becomes a mindless feral dragon, bent on revenge. After the hooded man is forced to retreat, Azura uses her special pendant and a special song to quell the Avatar back into their human form. Azura then gives them a Dragonstone, a special stone filled with the energy necessary to spur their transformation into a dragon safely without returning their feral state of mind.
The Avatar's child, Kana, inherits the Avatar's dragon blood. In their Paralogue, they are ambushed by invisible forces. The Avatar makes a timely appearance and tries to fend off the forces. Unfortunately, they are swarmed and despite their protest to make Kana head to safety, seeing their beloved parent wounded, Kana degenerates into a Feral Dragon and attacks the enemy forces in their rage. After dispatching the enemies, Azura helps the Avatar quell their child and gifts them their own Dragonstone to control their draconic blood.
The Feral Dragon class is technically a playable class as the player fully controls the Avatar in this class in Chapter 5 of Fates. This is the only chapter in the game in which this form is playable. This heightened form boosts their current stats, though retains their HP base. As a Dragon Unit, they are especially weak to Wyrmslayers. Kana, as an NPC in their recruitment paralogue, degenerates into this form for the chapter and has the same traits as the Avatar in the form.