Connection 2024 - when do they age into senior?

My first gen evolved into mametchi (girl) and violetchi (boy)! I am super glad for being able to reverse mistakes with games because I’d been really busy with work the past few days and definitely racked up a ton of care mistakes.

Also i never understood how the characters evolutions were determined by “care mistakes” as a kid and so after the first 1-2 gens my tamas were always the odd looking ones (eventually they were always masktchi and gozarutchi so I mustve really neglected them🥲)

They are just soso cute so i want to spend more time with them but i worry they’ll evolve into senior before i marry them off to each other. I have seen some stories of people’s tamas evolving to senior early at around 7 and could not find a definitive answer on when exactly they evolve to senior, if it’s affected by pausing by using the clock trick, etc.

Tl;dr anyone have any clue / firm answer / anecdotal evidence of when exactly i need to marry my tamas off before they become a senior?

Any help is much appreciated💜