Assuming they get around making any DOA girl (or NG girl) who never got their chances to be included in DOAXVV, since the DOAX favorite things to do is make completely brand new girls. Since Lei-Fang, DOAXVV never saw a DOA girl until 3 years later with Tina.
Training? I don't think training exist, for references in Girls section there is Lesson mode where you can have 3 girls in Lesson which you can level up your girl & collect upgrade materials (which is to upgrade your swimsuit) however any girl in Lesson can't be played as until its over (or use...
The only thing I would have done differently is whenever I get a trendy outfit, is to give the girl with trendy outfit a job worth 20 hours in the Owner's Room (but most importantly to level up job hours since you don't get 20 hours at the start).
I have 2,700 hours of gameplay, with My only missing characters are Tina, Elise, & Koharu. I got Kasumi's Sugar Perfume (was busy trying to get Tina with no success). The closet of tier list you'll ever get is how powerful the SSR Swimsuit in terms of stat (which is only important if you don't...
Nina looks pretty cool, and she's putting her guns to good use (not counting customization).
She is more of a Black Canary with a mix of Ada Wong, for MK maybe if it was back in the Midway games like Kira but definitely not MK as it is now.
Its been years once 14 days pass it would be the 10th anniversary of Metal Gear Rising: Revengeance. Guessing the memes involving with Raiden & Senator Armstrong caught yen signs of Konami executives when their not busy with Pachinkos or games with cute anime girls (Bombergirl & Chase Chase Jokers).