Selecting name from aggregated ID in Postgresql

Question

I have no clue how to do this.

    (Select Dane1.Name, Array_agg(Dane1.UpperCat) as "upper_category", count(Dane1.UpperCat) As data_count, dane1.room_id
        From
            (Select 
                    contact.room_id,
                    UpperCategory_Id As "UpperCat", /* uppper category ID of rooms */
                    Rooms.Name As "Name",
                    Rooms.Type
                From Public.contact
                Join Rooms On contact.room_id= Rooms.Rooms_Id) As Dane1
    Group by Dane1.Name, Dane1.UpperCat,dane1.room_id) 

Result:

Name	upper_category	data_count	room_id
Room 1	{25,25,25,25}	4	150

The goal is to count how many times the upper category occurs AND what's the name of said category.

It's all in Rooms table but I can't get that, only sub room ID's name. I don't care about {25,25,25,25} but the name that corresponds to that ID in the aggregate function.