>>26597697Serena is his bracelet, genetically engineered at Bills lighthouse almost 20 years ago using data obtained from the Amber experiment. The bracelet was implanted in Jane Doe, victim of a freak magnet train accident, and given her identity as Serena, Ash's "Childhood Friend". This was done to facilitate a bond between them, as the bracelet only functions when in perfect harmony with its user.
Serena and Ash are almost in said harmony. However, her human form is but a temporary one. Suffice it to say, Serena is going to Alola with Ash, but Jane Doe is not.
