Imagine how agressive Cloud (-Steven's starter dragon in dv2-) would get based on how old Steven gets...and if he regress to a younger state like how he feels like a baby during "Steven's birthday"

Grows naturally, and could protect himself
If Steven ages normally or is probably around 13-16
Cloud's agression level is on 20%
Tame level is around 80%
He could care less
If Steven could protect himself, its fine

Regresses into a kid
Steven goes back being a childish soft boye
Cloud's agressrion might rise to 50%
Tame level is around 50%
Cloud will get slighlty agressive...but still quite tame

Regresses into a toddler
Cloud will look and gives off a more protective look in his eyes
Cloud's agressrion level rises to 60%
Tame level is around 40%
Hurt him, and Cloud's gonna attack you like a stormcloud

Regresses into a baby
Cloud's very agressive in this state, well...not that agressive around people he knows
Cloud will treat the people he knows a 50% since he knows they wont hurt his currently regressed tamer
But....
Cloud's agression level around other people is either 90%, 82%, and 99%
His tame level is around 10%, 18%, and 1%
Hurt or make baby Steven cry...
There's a agressively angered Mini Dragon coming after you-