Ok, first of all you need to win her heart by gifting her new consoles and games and play with her

Step two, you have to upgrade her with WMBFRC6900 to make sure she can handle big and long tasks

Step three, make her a purposal by making a wedding ring, or you can use onion rings, they are tastier

Step four, have mini-Arisu's, as they will be her children they will be also immortal and will live forever with her

Congrats, now you fulfilled your dream of having a loyal gamer wife who loves you unconditionally