HCA: Hermit Crab Association

i prevously had two hermies, one has passed recently (scully). i was wondering if it would be possible to keep my remaining crab (mulder) by herself? i have ample space for multiple crabs, but mulder is extremely food and shell defensive and i think it may be the reason for scullys death. they never fought for real, but from day one mulder would chase scully away from food and shells. i bought plenty of suitable shells and had multiple food sources but it didnt seem to help at all. scully just buried constantly, i got him last october and he had been buried about 3/4 of the time i had him.
i know hermit crabs are social creatures but im not sure that mulder isnt just a bully. if i have to get another crab, how would i go about making sure this doesnt happen again? i need advice :[

Yea but they might be sad get fake crabs that don’t move I’ve here as the keep company

What used to be thought of as social behavior is now known to be more a matter of resource sharing. So while you can get more crabs if you want to, crabs will certainly be just fine alone as well.