Somebody mentioned Nobby as a likely person to have stolen beet's amulet yesterday.
Looking for possible groups (based on Stephen's death message):
- those of Uberwald
- the Undead Community as a whole
- the City Watch.
With a confirmed wizard I would expect the Unseen University as a group.
(N.B.: using the term "group" lightly, not indicating that they win together perse, or have night conversation - if Yuna is not lying her being part of the Undead community does not imply being together, or even knowing there are more).
The Hippos seem to be a group, although we haven't actually seen anyone in-game - but then: we haven't seen anything much period.
Omnians could still be a group (although this seems less and less likely to me), or a one-man (by now possibly 2/3-man) Cult. (Not that many named Omnians, were there?)
Opposed to the people from Uberwald (or maybe broader: foreigners), we can pit Ankh-Morpork natives. Maybe three groups: Ankh-Morpork/Uberwald/Ramtop Mountains?
Wild guess: maybe any of the Witches?
Any other groups that may be identified? I can think of the guilds, but none are big enough to have 3 characters in this game I think.
Can we Hypocop groups? Would that be useful? Or maybe we can Hypocop nationality. Asking for nationality or race as was suggested on Day 1 is not a good thing, seeing we (likely) have a xenophobe, murderous group amongst ourselves. But hypocopping will not expose foreigners directly.
We also seem to have a role heavy game (with investigative roles, survivors, multiple), so asking for profession is not a good idea either.
Other option: coded mass-role claim. Risky, but might be worth it. Any anomalies may help.