From Saint Seiya Awakening Wiki

PvP battles include:

1. Galactic Duel: Single-player real-time online PvP competition. Open time: 12:00~14:00, 19:00~22:00 everyday

2. Saint Arena: 1v1 auto-battle mode, open all day. The higher the points, the better the ranking, and the greater the rewards.

3. Train Hall: Single-player challenge, open all day. Requires challenge vouchers to participate.

4. Sacred Duel: Full-attribute balanced PvP battle. Open all day, cross-server matching