There are four Survivor Types in Identity V .
Assist Type: This type of Survivor excels at assisting Teammates in various ways to help the Team gain an advantage.
Sub Assist 
Contain Type: This type of Survivor excels at escaping from Hunters or delaying Hunters' pursue to help the Team gain an advantage.
Sub Contain 
Decode Type: This type of Survivor excels at decoding Cipher Machines quickly, thus reducing the time it takes for the Team to activate all of them.
Weakness: Poor self-defence and relies on the protection of Teammates.
The decoders should focus on decoding Cipher Machines and try to hide from the Hunters as much as possible since they are a high priority target for Hunters .
Rescue Type: This type of Survivor excels at rescuing Teammates from Rocket Chairs and and containing the Hunters in order to help them escape.
Weakness: Slow at decoding Cipher Machines and requires Teammates' help to make up for it.
- Note: Not all of the above combinations are possible, but they are shown anyway.