Caravan

Caravan is an upcoming group of NPCs in Hollow Knight: Silksong teased by Matthew "Leth" Griffin in the Hollow Knight Discord after members were able to solve a riddle.

Little more is known about this group except for a description and a gif also provided by the same source.

''“You’re a traveller? A kindred spirit! We hear it's good luck for wanderers to meet on an unfamiliar path. It’s luck we need too, for these roads are haunted and danger snarls at us from every dark corner. Our caravan has only a single, humble wish, but it seems now as though it will never be granted...”''

''A friendly band of travellers trekking the dangerous roads of Pharloom in search of something precious. Masters of the journey, their caravan boasts a bounty of flavourful food, powerful drinks and some surprising amenities. They wish to gather the playful young fleas scattered across the kingdom, but this land is far more dangerous than they thought.''

Fleas
Fleas are creatures found sleeping throughout Pharloom. When Hornet approaches a Flea it will wake up, let out a yawn, and then fly off into the foreground- presumably to be taken in by the Caravan. They are described as a "lovely little gentle flea" and have "come to Pharloom for enlightenment".

Trivia

 * The function of these NPCs seems to be similar to the role Grubfather and the Grubs played in Hollow Knight.
 * The riddle solved to reveal these characters featured words that contained some matching letters with the solution. The riddle and solution are outlined below:

References