Pattern
The person and the role are two records
Keep a role specification and a person's Eidolon as separate linked objects so work is not written for an office as though it were a personality.
The split
The role specification states scope, decisions, authority, reporting, accepted outcomes, and the evidence the office must produce. It survives a change of occupant. The person's Eidolon states how the current holder thinks, communicates, decides, what they have done before, and what they consider settled.
Link them in both directions and date the link. When the person leaves, the role record stays and the Eidolon detaches.
Why it matters in practice
Claim: inference
Merged records produce two failures. Work written for the office sounds impersonal and ignores how decisions are actually made here. Work written for the person assumes authority the office may not hold.