Alliance Enthusiast
From Strange Crate. Maybe a bit too enthusiastic. Humanoid type. ***NEW IN 7.3*** A great quality of life change was introduced in Patch 7.3 for pet collectors!
The 
Alliance Enthusiast is a battle pet obtained through the PvP Honor system — in Legion it was rewarded at Prestige 1, while in Battle for Azeroth and beyond it is unlocked at Honor Level 20.
Guide awaiting review
Earn Honor Level 20
Participate in PvP activities to accumulate Honor and reach Honor Level 20, which rewards the Alliance Enthusiast directly under the Battle for Azeroth and later Honor system.
Claim from Legion System
If playing under the Legion Prestige system, reach Prestige 1 by first climbing to Honor Level 50 and then Prestiging; once you have unlocked the pet on one faction at Prestige 1, a character of the opposite faction can purchase the equivalent pet from Captain Roberts (Alliance) or Sarah the Savage (Horde) in Legion Dalaran.
Summon on Alliance Only
The Alliance Enthusiast can only be summoned and leveled on an Alliance character.
Tips
The Alliance Enthusiast periodically performs random emotes, including scooting closer to you, writing your name in a heart, cheering for you, and stealing a strand of your hair.
