The moment Trish said she was doing the right thing by staying behind, Josh nodded, "I'll be staying with you. I can't leave you here alone" he told his sister, knowing there wasn't much he could do when they confront people with mage abilities anyway. With the others all finished preparing, he gave Serena a tight hug, "come back safe" he said to her, kissing her temple before letting go. 

Fia and Kay nodded and began heading out with the group to outside the mill House. This whole plan of just storming in to get Bane felt far too risky to Kay, hells, it barely felt like a plan to her but she had to do what she could to help Bane and get him back to Serena. If they could help Bane, they help Serena and hopefully put a stop, or at least a pause in this big plan to corrupt them both.