In the default battle system, your actors don't have a battler right? you only see the name of your actors, but no visual sprites... only enemies have battlers...
Now that's what the battler scripts like Yanfly's, Yami's, Victor's etc does... it allows you to have battlers for your actors... plus a lot more...
Now, if you only want to have the basic capability of having battlers for your actors, then yanflys scripts are the easiest to use... it uses the current sprite for your actor as a battler sprite
If you want support for both normal and holder style sprite battlers, plus custom animations (like your character goes to enemy, hits with a weapon sprite etc), then go with Yami's
I won't suggest Victor's since it's harder to implement, and since you're also gonna use Yanfly's scripts, you might need to edit Victor's scripts to be compatible with yanfly...