This Seems Like a Pretty Big Problem...

Griseo 12 years old, but I remembered Griseo as 10. Then I got her birth date wrong, saying she was born after the Fourth Great Honkai (she should have been born around the time of the Second Honkai)... Damn, I can't fix it now... Griseo was born shortly after Hen and Blanca got married... This seems like a big problem... I've even forgotten where I first saw this setting; it's strange to myself, it seems a bit late. I need to seriously consider whether to change the earlier parts... (This seems like a huge undertaking).