Just so you know, for the blended family, it seems that in the V5 there is no specific sort of character they will evolve into. It depends on how you take care of it.
I believe I had almost the exact same thing as you, and in my opinion Tororotchi is hideous. I expected for it to evolve into something even more ugly.
Well, I definitely wasn't right. First it was an Ichigotchi and I was shocked when I saw the EXACT character I wanted on my screen a couple mornings later: A HOTTEATCHI!
My best idea is this.
When they ask for training, the first item is smart, the second cheerful and the third easy going.
Mametchi is usually referred to as smart, characters like Memetchi cheerful, and Kuchipatchi is very easy going.
However, as I didn't know about this until after these Tamas were adults, I used a variety of smart/cheerful/easy going and ended up with the members of two seperate families (Kuchi and Meme) and I could easily start a pure family with these characters.
So really, it's how you take care of them.
(Keep in mind overfeeding will garuntee a Large family, and underfeeding will garuntee a Small family. Didn't really make sure they were happy? The Ninja family is moving in.)
Good luck! ^^