Speech Balloon Maker （ふきだしメーカー） (speech-balloon-maker) free WordPress plugin

At your Edit Post view, use shortcode as [balloon-r] or [balloon-l].

Change balloon style at ‘Tools’->’Speech Balloon Maker’ screen.

You can also change style at shortcode parameter ex. [baloon-r name=’foo’ style=’border’ img=’https://foo.com/bar.jpg’]