627, 625 and 628....Lilo

Experiments 625 (Reuben), 627, and 628 (Lilo). Lilo isn't ACTUALLY 628, but Gantu doesn't know that, and neither does she....as she loses her memory for a while after being accidentally turned into an experiment.

More about Lilo: [link]

Since she can't remember who she is, she agrees to stick with Gantu and his two experiment colleagues, and becomes friends with the two of them. Particularly 627, as Reuben feels like there is something 'off' about her.

This would take place after the TV series, but before the Japanese anime (not the English dub.)

So yeah.

I like experiment Lilo

Lilo and Stitch (c) Disney