The vessel is clearly minor coded, it is shaped like Kris, it is actually SHORTER than kris, it wears a striped sweaters (Kids wear striped sweaters, teens are just bigger kids)
Thus, the vessel is likely a mockery of a teen human.
However, the player/soul can be an adult, the person controlling the vessel may be above age.
Who should the vessel be shipped with? Kids or adults? It is physically a kid but mentally/spiritually it is an adult.