How to create your own Companion?

[Alkorri]

Hey there, all. I have no modding experience whatsoever, just in game development, and was wondering if anyone who knows ESO addons better than I could explain the complexities involved in:

1) Designing the look of a new companion from some kind of char gen
2) Creating the quest for player to recruit that companion
3) Using the existing companion dialogue framework in the game
4) Finding out whether this is completely illegible and an instant ban offence by ZOS if one were to write such an addon

I am weary of tank characters who are both goody-two shoes, and companions who keep spouting the same lines after killing an enemy or harvesting a resource (I'm looking at YOU, Bastian)