If you're asking if you can use the developer console to change Hanna's max sub the yes just use the console command name.sub.max=x replace name with hanna (make sure it's lowercase) and the x with the value you want.
But if you asking if you can use the console to change the requirement for the event then no, but using
UnRen.bat with
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you can directly modify the game's files thus modifying things like event triggers, dialogue, ect you just need to find the right files for what you want, like for Hanna's event once you've extracted the RPA files go to the file named "ch" then find the file with the name of the girl you want, unless it's one of the DLC girls cause then you'll want to go to the file named "dlc_fafow" then the file named "ch" in that one and you'll find the DLC girls there.