Kostas Phlores

Project Gutenberg lists Kostas Phlores — also shown there under the forms Floris and Κώστας Φλώρης — as the author of O Psycháres and His Work. That record is the clearest source available here for his name and authorship.

Beyond that, reliable biographical details are scarce in the sources I could confirm during this conversation. Because of that, it is safer to describe him simply as a Greek author associated with a study of Yiannis Psycharis, rather than add unverified facts about his life, dates, or career.

No suitable confirmed portrait image was found from the pages available here.