Annabeth: She'll likely spend Christmas in London with her parents for the last time when not finishing wedding prep things.
Cornelia: Pendergast/Lestrange things??? Maybe she'll try and host her first event.
Calla: She'll be going home for Christmas this year. All her friends will be receiving presents via owl closer to Christmas. What those are to come.
Demelza: Will be going home for family events.
Linnet: Will be going home for Christmas. Idk what the Unbernaulds are doing.
Tanwen: Selwyn family events. Return to being a glorified nanny as the hoard returns.

People I am bringing back!
Germander: Lestrange events? Probably not that much of a festive person himself but can be dragged along.
Iziza: Other than the day of Christmas itself, work as normal.
Octavia Rose: Family events and uc events! She is very festive and loves Christmas.