How old are each of the main characters in lore?

[Rannie]

/snip

the times they spent on the 1st have no bearing on their ages due to the fact that they weren't there in Physical body and had a temporary body created. (Case in point look at Cylva, then look at how long she's been wandering around on the first after she had been put in suspended animation after dying on the 13th by Elidibus. If it's not your home shard, you DON'T age unless you come there with an actual physical body.) There were only two people from the Source that would have and DID age. One was G'raha Tia but his life was prolonged due to him Merging with the Crystal Tower and thus aging but not dying, and the PC due to being summoned there completely.

Taking out head canon which is not valid canon in a lore forum for exacts. The Twins as was said before are 16 and the others are they're respected ages from the beginning of 2.0.

The intro cutscene for 1.0 for thancred and ALL the other people in the CIRCLE OF KNOWING. Happened 10 years before the start of 1.0 NOT 5 the echo flashbacks from 1.0 are that old as well. it's give you the actual time frame on the EVENTS including the DEATH of Warburton on page 51 and 52ish of the Encyclopedia Eorzea... (also the some 15 years ago before ARR, due to the simpsonesq time bubble that the story is in Minfillia herself comments that SOME 15 years had passed since her father died while they were all moving to the RISING STONES.)