There's no bots can delete them don't care about losing images this is impossible, except if deleted by bunnycdn due to filing a complaint copyright request....
to crawl manga from madara theme to another you'll need to program your plugin by yourself I didn't find any plugin can crawl and upload chapters automatically so no one created this plugin yet , the only way to scrape chapters from madara is downloading them manualy or image by image chapter by chapter , NO ONE HAVE TIME TO DO THIS! , wp manga chapter preventing downloading images , then they will screenshot the chapters using chrome extension..... , there's unlimited ways to scrape content, even with chapter protector it have limit.