LogFAQs > #968499070

Aivu levels up when you gain a mythic rank so she gets stronger as your power develop and she also grows bigger so you'll be able to ride her around MR7 or 8.

Also just beat the chapter 3 final boss out of a single charge at the start of combat, playing on core but this was done with a dire bard azata. I would imagine a gendarme cavalier would've easily destroyed him since that's a full BAB class with nice charge bonuses. Since kitsunes get vulpine pounce when their BAB reaches 10, for medium BAB classes this comes online around level 15 and for full BAB classes at level 10, this allows you to do a full attack out of a charge which is very powerful and with azata incredible might you get some nice synergy since that activates from charge or critical. Otherwise you need a skald or play a barbarian to get the pounce ability. Pretty satisfying stuff, she was able to bring down the big bad balor from a single action.

https://gamefaqs.gamespot.com/a/user_image/0/7/0/AALLlEAADvw2.jpg