U kunt $expr gebruiken met $in :
Person.find({ $expr: { $in: [ "$age", [15, 20, 12, 0] ] } })
EDIT:om arrays te vergelijken heb je $setIntersection nodig en $size operators, probeer:
Person.find({
$expr: {
$gt: [
{
$size: {
$setIntersection: [
[
"15",
"a",
"12",
"0"
],
"$age.x"
]
}
},
0
]
}
})