You can make speech balloon as you like.
Plugin Tag: balloon
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WP-Speech-Balloon
WordPress の記事内で簡単に吹き出し会話を使えるプラグインです。AMPページでも通常ページと同じように吹き出し会話を使えます。 This is a plugin that makes it easy to use balloon conversation with WordPress.
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Word Balloon
Support for Block editor(Gutenberg) & Classic Editor.You will easy to add speech balloon in your post.