Question: Is it possible/okay to use a node as reference without making a corresponding

@relation

?

type Person {
  pets: [Pet!]!     <- like that
  name: String!
}

type Pet {
  name: String!
}

No

Only way would be to store the ids as a string array. But you would have to manually manage things yourself and would not be able to use the power of hierarchical nature of graphql