Topic: solo or trio?

question, if there's an image where the same character appears thrice, is it considered a trio or solo?

It depends

if its multiple images it's solo: post #5136914

if its multiple copies of the same character existing in the same scene its trio: post #2700202

The same character across three scenes? Three alternate versions of the same character side-by-side? Three fully identical clones? Need a bit more to work with here.

Seems kind of arbitrary. Assuming it's an age progression for example, it makes no sense to me to use trio, but someone else might consider it crazy to tag that solo. Being an edge case, of course you'll get people using both.