Fersen is an accomplished poet who regularly plays with language, using puns, rich rhymes, symbols and images taken from the realms of plants (vegetables and fruits) and animals (birds and various beasts) to tell stories or original fables, to recreate moments from daily life, impressions and sentiments, and also the dreams of ordinary people and their failings and faults.
Fersen's poetry is characterized by its use of language play, imagery drawn from nature (plants and animals), and focus on themes like daily life, human emotions, and common struggles.