There should be contradictory elements about the characters relative age, ideally 4 or 5 things and not just 2. Such as someone who attends high school but appears to have a 9-5 office job too, they talk about multiple tours of duty in the military but unable to buy alcohol, they look and act the same age as the explicitly 20-something cast but happens to have an adult son, etc.
Artistic Age is sometimes part of it, without explicit age lines or greying hair someone who should be in their 50's looks more like they are 30.
Any example that is just "age not said out loud" isn't the trope.
Comics are just words and pictures. You can do anything with words and pictures.Done a wick check and added the trope to the long list of Tropes Needing TRS.
Oldest Internet Archive copy
. The name definitely seems too, well, vague to cover what Emerald Source describes.

I have seen Vague Age frequently used for "character X's age is not mentioned". Is this sufficient for the trope to apply? The Laconic description seems to suggest so, but the full description provides more nuance. It suggest that the trope involves more than just an unstated age; namely conflicting or ambiguous hints about the character's age throughout the story.
What's needed for the trope to apply?