Vree have an Oligarchy based government, organized into guilds. The most powerful guilds of the Vree are the Merchants/Adventurers; their close allies the Scientists, the Smiths and the Entertainers.

The Guild of Merchants/Adventurers is the one which has a treaty and trade agreement with the Interstellar Alliance and is the one whose military forces participated in the Shadow War.

Vree are small but tough; all cartilage and muscle. Their nature is competitive, fierce, and wild. They take great pleasure in playing practical jokes and are hugely amused by their iconic nature among humans. To think that a routine survey of a planet could so affect a society is something the Vree find wildly funny and is the subject of many jokes.

(from the B5 Tech Manual)

Other Sources:
Race: Vree  
Abilities Cost
Biology  
1) Large Brain: +3 INT 3
2) Large Brain: +3 EGO 6
3) Red Giant Homeworld (large eyes): IR Perception (Sight Group) 5
4) Small: +2 with DCV 10
Racial Skills  
1) Guild Member: KS: [Guild of Choice] 12- 6
2) Guild Member: PS: [Guild of Choice] 12- 1
3) Guild Member: +2 with any three Guild related Skills 2
4) Language: English (fluent conversation; literate) 1
5) Little Green Men: KS: Earth History 11-  
6) PS: Practical Joker 11- 1
total
 45
Disadvantages Value
Normal Characteristic Maxima 0
Guild Membership [Choose Guild]: (Frequently, Major) 15
Physical Limitation: Small, -3"KB (Frequently, Slightly Impairing) 10
Psychological Limitation: Practical Jokers (Common, Strong) 15
Reputation: Grey Aliens of Earth Legend, 11- (Known Only To A Small Group) 5
total

45

Hero Designer v2 file (package file)