Code (Skript):

1. add "Tini", "Best" and "Ailumi" to {list::*}
2. set {nick::%player%} to a random element of {list::*}

 

Or:

Code (Skript):

1. set {_Random} to a random integer between 1 and 3
2. if {_Random} = 1:
3.     send "you set Tini Nick"
4. else if {_Random} = 2:
5.     send "you set Best nick"
6. else if {_Random} = 3:
7.     send "you set Allumi Nick"

--- Double Post Merged, Apr 24, 2018, Original Post Date: Apr 24, 2018 ---

@TeAm6_AZLIK You should use local variables in this case

 

Or, in one line

Code (Skript):

1. set {nick::%player%} to random element out of ("Tini", "Best" and "Ailumi")

 

Why would you do it like that if you could do it in 1 to 2 lines?