Fei-Yen is the only one for me. The most beautiful weapon of mass destruction in the universe.
Faiyubi is without doubt the most powerful waifu in known fiction. The official lore sets the precedent that she is a sentient artificial intelligence that not only can transit cyber imaginary space at will, change her form and size to whatever she wants, but can actually come to our reality in a similar manner as the original arcade game is said to have been "teleported" to Japan in 1995 by the DNA Corporation. over 5000 hp, 14 meters tall, and her chest is an orgasm gun. you just can't get better than this.