Your first though upon seeing the title would probably be, 'surely they can't actually mean a real assault helicopter?'  Well you would be certainly right in that your daddy is not an actual mechanized flying vehicle!  Your father is strong, super strong, basically a demon lord boss level or whatever.  That sounds good right?  Having a super strong parent to what over you?  The problem is your dad is a 'helicopter' parent and he just won't leave you alone no matter how big and strong you grow up!

Your papa is a bit of a harem king too and has a lot of wives from a wide variety of species, meaning you, progeny, can be a whole host of different monsters, heck even human potentially.  You live, grow, fight, etc but always the ever embracing shadow of your eternally loving papa looms behind you, never knowing when he is going to make a surprise visit or try to 'fix' a problem for you.  Can you survive the suffocating embrace of your assault helicopter parent?

[hr]
Alright so that's the general gist, the other thing I was thinking was maybe he decided to experiment a little and did a memory infusion on his children, stuffing in the memories of say, some person in another dimension such as 'earth' but maybe it would be better not to push in that kind of isekai element.  Well in general think game-ish, type fantasy world setting with dungeons and kingdoms, etc and you should have the general gist of my idea.  However, your greatest foe will be your never-letting-go-completely parent, will you ever be free from their crushing, fatherly love?

Well time to see if the title and basic idea gains any traction before I go any further.  Have fun!