In update 1.6, in personal offended the Serenitea pot, the ability to place Companions was added, with the correct placement, you can get the Primogems, then more details.

How to settle the characters in the Realm - you need to talk to the Tubby and get the Cloister Admission.

From now on, you can arrange characters from your collections.

Why do I need character placement in the Serenitea pot?

Characters that will be installed in the Realm will receive 5 friendship experience every hour.

Also, there is an opportunity to get the Primogems from companions, but more on that below..

New companion kits

New set drawings have been added to Tubby Treasury, they are needed to get the Primogems. Purchase these blueprints and place them in the Realm (we recommend using the empty form of the Realm)

After the kits have been purchased, study them and collect the required amount of furniture. Then install the kit and walk up to it. The "Invite a companion" window will appear, in the window you will see which character this kit is suitable for.

Switch to furniture placement mode and set suitable characters.

If done correctly, talk to the character and receive a reward.