Finally one of Pilot’s branches replied to my enquiry.
Pilot Australia got back to me. They had forwarded my enquiry to their headquarters in Japan, which gave the statement that they are not able to give any information about products being free of animal derivatives. The topic of the cruelty-free status was not touched upon.
So this is the new compendium entry:
status: October 3rd,2021
cruelty-free status: undisclosed
products free of animal derivatives: no information disclosed (by choice)
Source: mail contact