Upgrading crew members stars is an important way to increase crew members power. Upgrading stars consumes corresponding crew member fragments to increase that crew members attributes. Crew members have a starting star level of either 1, 2 or 3 stars, and can be upgraded to at most 5 stars.

1. Upgradingstars consumes corresponding crew member’s fragments, upgrading stars can increaseattributes and also skill power damage.  

2. The star capis 5 stars, all crew members can be upgraded up to 5 stars, and cannot beupgraded again after 5 stars.

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