Serena didn't want to perform the ritual—she felt a sense of disgust and hatred towards Lumina. Yet also knowing that, like her, the hero was manipulated and powerless.
However, looking at the man she loved slowly beginning to waste away, it felt agonising to have to pair him with this woman.
'Will he ever forgive me, if I kill her... can I take in that filthy energy and perform the ritual myself?!'
'Can I really not go and fetch those girls..'
Baku's eyes looked at the goddess covering her face with both hands.
He knew her struggle—there was a communication line between the lesser gods and the spirit beasts who protected the lands.
Thus, they knew the basic information of what happened and who this monster was; he figured it out from Serena's words and actions.
"Goddess Serena, you know that they are watching the beast empire with all their power. The moment you descended here was the trigger for their trap."