pity guest

noun

noun

Informal A person who is invited to a party or other function not because their presence is desired but because inviting them seems necessary.

In fact, I think I'm a pity guest myself, just there because I was part of what Nola Morgan Design considered their team.2012, Judi McCoy, Fashion Faux Paw: A Dog Walker Mystery:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.