The age start at Shanks when he is 16 year's old and Benn was 27 years old, that will put her in 18
Little different age

.

However, in the story her 'looks'  is going to be off when she gets older, example{she's in her 29 but she looks like her 18, as know eternal youth only a few people have it}

I have to do a lot to math and research, when Benn and Shank first meeting with their journey. They are 11 years a part, but subtract by 12 and there you go you ☺️

Short words
Your name - y/n
Year's old - y/o