D22 is a theater founded by 3 Mimar Sinan Fine Arts University. Their plays usually have a social context and their main goal was to reach to just one more person with each play they were putting on stage. Therefore the logotype refers to these aspects. D is the final row and 21 is usually the last seat in each row. The name of the theater is D22 refering to the first person they reach. The logotype also symbolises the first person they change with their social message.
Also the 3 characters in the logotype are connected because the theater was founded by 3 people. They are the ones who have founded the theater and also the theater keeps them together.