Responses
3 years have passed, so if they were 15 when they were in the 104th trainees squad, then now they're 18~
Mind you, it's only 3 months. They are still 15. Check the latest chapter, Eren's and Connie's conversation. Only 3 months have passed since the Colossal Titan Attack.
How old is Eren right now?
And how much time has passed since they were in the 104th trainees squad?