Okay, lets see how much work this actually is.
Open game/scripts/subscribestar folder -dont blame me, blame selebus-
Open inappropriatecontent.rpy in an editor.
use the searchfunction to search for the last thing the girl does say before the name is choosen. For ami this would be "Well...what would you want me to call you instead, then"
Scroll down a bit and look at the different options.
And that is all. I mean writing this post took longer and made more work as just looking it up. So... its barely any work.
Edit: And if anyone still have doubts about how full of himself he his, just look at him adding himself as one of the unique options.