TBH I don't understand the craze for code girls.
Their stats are major level bad. Even event girls are better than them.
Chance of maxing them is 0%. And even attempting is a waste of resources.
What are you all trying to achieve? Bragging rights? No one honestly should care if you have the character or not. Waifuism? Please go outside. Get a GF. Have a GF already? go see a movie, dinner, laser tag, it doesn't matter, spend the money on your SO.
At least 6* waifus are useful.