Redis is a key-value store and not a relational database. As such, there is no native function that would maintain entity relationships. If you wanted it, you'd have to write this into your app.
The closest thing I can think of is what you find in the Mongoose.js module. Mongoose defines a Schema that defines fields used to format and validate documents fetched/saved with MongoDB and also allows for subdocs which could possibly start to mimic relationships between entities.
...but considering that Redis has a record expiration/TTL feature built-in, that records are stored in RAM, that it's a key-value store....it feels a misplaced effort to attempt this. Even Mongoose doesn't provide functionality to enforce referential integrity between collections and limits help to improving record consistency with validation/typing via its Schema.