(Sorry if this description isn't very good i'm not brilliant at descriptions)
Tilly has been with almost all of the generations of Uzumaki's that have held the nine tailed fox, she hadn't aged because she hadn't found 'the one' as we shall out it...
(This is part two of the third chapter and I think this is the last part for this chapter but I hope you enjoy.)
It was the day after the incident between Iruka and Try and it was now time for the graduation exam Tilly made sure Naruto was fed properly before the two left for the academy...
-time skip-
The graduation exam was over and Naruto had failed but Tilly had passed but what Tilly didn't know was that Naruto was somewhere in the forest with the forbidden scroll and was learning the shadow clone jutsu. Iruka had been looking all over the village but got no sign of Naruto and he didn't want Tilly worrying, that was until.
Tilly: "where is Naruto?" Iruka: " *sigh* he stole the forbidden scroll."
Tilly stiffened and then breathed in slowly and Iruka knew he should have really gotten her earlier. Tilly looked at Iruka something in her eyes said it was going to get a bit ugly but she only told about where her precious 'cub' was.
Tilly: "he is in the forest."
Iruka nodded and followed Tilly to the spot where Naruto stood with the scroll on his back and he looked extremely worn out...
(Summing it up now.)
It turns out Mizuki had back stabbed everyone and even told Naruto of the nine tails, he even told him about Tilly's connection with the fox and the sealing also how she was a the other demon fox that he learnt about in the academy. This upset Naruto and he ran, Tilly didn't go after him because she was far too angry but she was unable to move because chakra chains had been placed on her by Iruka... In the end Naruto ended up beating Mizuki and forgiving Tilly for not telling him the secret and he even got a headband, he was now a Genin...
A few days later, after the incident of a little boy named Konohamaru who tried to get Naruto to be his trainer: (I know this is a completely different episode but I had to add all of this in because I found it easier.)
It was the day Naruto and Tilly were to be put into teams and Naruto was the first up. -no surprise there.- Naruto had got himself ready and had rushed to Tilly's room to wake her up but she was being stubborn.
Naruto: "come on, Tilly!" Tilly: "what do you want?" Naruto: "we get put into teams today so hurry up!"
Tilly groaned and slowly got out if her warm bed and -gently- pushed Naruto out of the room so that she could get dressed:
Then proceeded to very slowly do the rest of her daily routine, though that day would be different because she changed into her little fox form:
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She went to the kitchen and watched as Naruto drank from a milk carton that was out of date by months, Tilly was going to tell Naruto but he put the milk down and stood up then began to run out if the apartment. At one point the two came across Konohamaru but that encounter didn't last long and Naruto continued to run a the way to the academy with Tilly in tow.