Hedgehog
The hedgehog's presence in one's life remains entirely optional. Millions of humans complete their existence without ever encountering Erinaceus europaeus. One might actively seek hedgehogs and still fail to locate one, particularly during winter hibernation periods spanning November to March. The hedgehog respects boundaries, appearing only when conditions favour mutual benefit.
Death
Death maintains an unbroken appointment record. No human in the 300,000-year history of Homo sapiens has successfully cancelled or indefinitely postponed their scheduled meeting. Even those who have technically died and been resuscitated merely received a brief extension, not an exemption. Death's calendar management remains unimpeachable.
VERDICT
The hedgehog scores poorly on inevitability metrics, whilst Death achieves a perfect 100% encounter rate across all demographics, geographies, and tax brackets.