Extracting images from Berserk Raging Waves of Mercenaries Apk asset bundles

I really love the artwork of this game but the game is only available in japan, Can someone help get more of this games artwork, all help appreciated
Here are the ones i was able to get from the assets (im new at stuff like this so i was only able to find this ones)

And here is some i found googling:

here is the apk link if anyone wants it - http://www.mediafire.com/file/w8sgaj29pg4oo38/ベルセルク〜快進撃!怒涛の傭兵団〜.1.3.2.apk