So far my favorite characters are Konatsu and Wien.
I agree the character interactions look natural. It's one of the things that I like about the show.
Watched episode 10 today.
Amazed that Wien had a lot of passion to perform a sentai show in the street, when his friends are all nervous. At first I thought he was funny. But then after Konatsu's bag got stolen, I think Wein is admirable "carrying on the will of ganba red" - he sure acted like a real hero back there even though he got beat up. He must have realized that the item inside the bag is important to Konatsu.