Pup in Fluff
Liza is sixteen. It says that Elizabeth got the diary for her 16th birthday and Liza was wondering about the similar age.
Nana is thirteen. When we originally wrote it, Nana was 6. Now I guess she's a prep. My cousin is 16 and has a princess room. (she just made it last year too) and about the fairy princess thing...maybe Nana's on drugs or something. xd Ask Oni about that one. Oooh, yeah, and it says last year she was in ninth grade. I need to pay better attention.
Yes, Nana sounds more 6 than 13. 8 or 9 might even work as well. 13 is just a bit too old, and the sister relationship is a lot different at 3 years apart than at 6 years apart. Their relationship sounds like she's a lot younger. Their relationship the way it's written now sounds like my relationship to my younger sister who is 12 years younger than me. It is more like that relationship than the one I have with my sister who is 4 years younger than me. It may have to do with their ages as well though. The older of my younger sisters is 16 and the younger is 9. 9 is the oldest I would suggest you make Nana. Either that or rewrite it cutting out the part where she seems dependent on Liza.