(I'm gonna say they're like, 12)
You had just moved to Hawaii with your family. You really didn't know what you were gonna do when they told you to go run around and explore. You began walking by the markets and little souvenir shops, trying on glasses and hats and things. When you got bored of all that, you decided to go down to the beach. You waded into the water kicking up sand and shells, sloshing around in the clear water. You then felt something grab at your leg and make a weird growling noise. You look down expecting a little kid that got annoyed with your antics but instead saw a strange blue bear looking creature, with a wide toothy mouth and big eyes.
"Ahh!! What is that!"
You fell into the water, consequently soaking yourself to the bone.
"Stitch, cut it out!"
You saw a girl running towards you. Or, rather, running to retrieve the animal she called Stitch.
"Wh-what is that thing!"
She looks at you for a moment, then replies,
"He's my...dog!"
"No way is that a dog!"
She put her hand out for you to take, but the thing kept growling at you.
"Stitch! Leave him alone!"
You took her hand and stood up about to leave.
But you stop when she introduces herself,
"I'm Lilo, who are you, you seem new?"
You give her a suspicious look, not really wanting to give her your name.
"I'll leave if you don't want to answer."
You decide you should, it would be good to make new friends.
"I'm (y/n) I just moved here from (your state/country province)"
"Oh cool! I've always wanted to go there!"
Stitch seemed to have warmed up to you, no longer growling at you, but rather was now scratching behind his ear.
"Come on! We can go to my house and look at all the cool stuff we have!" She grabs your hand and pulls you along. You think you've just made a new friend.