Sei hails from Chile and plays Age of Empires II. Over time, Sei has accumulated 980 matches in Age of Empires II. Sei is most active in the ranked random map team ladder.

Sei has a clear affinity for Saracens, choosing it in 45.2% of their games. Sei wins most often with Mayans—58.3% in 144 games. Across 266 games on Nomad, Sei has a 59.4% win rate.

Sei has the highest win rate in the flank position: 53.2% over 252 games. On the RM Team leaderboard, Sei has a rating of 1038. Sei has a win rate of 50.7% in RM Team (807 games played).