Hello! Here is a kitten sunning itself in light of your illuminating question...

We discussed this behind the scenes and came to this conclusion: because we are permitting players to keep their characters' powers, we will also be asking that players keep the weaknesses associated with those powers. Vampires who are weak to sunlight in their canon will be weak to the Ethyraia's sun too — this also goes for any other characters with sun-based interactions. Operate as if it were Earth's sun for powers and weakness purposes.