'Well, it seems they are quite capable.'
Fein had to say that the two were quite capable. Although his space containment wasn't up to par yet and hasn't reached the ideal level he had in his mind. It could already contain, or immobilize, the most ordinary S-ranks.
If he wants to strengthen his space containment, he has to improve his understanding of space, which wasn't that easy.
'I have to kill these two as soon as possible or they might alert others.' Fein thought inwardly. He didn't want to cause too much commotion.
Derke and Lionel finally saw Fein on top of the ceiling, standing upside-down like a bat.
"Who are you? Are you sick!? You are quite daring to steal in the royal family of Revenant country..." Derke's blooding wings squirmed and its sharp edge pointed at Fein, ready to attack at any time.