Surprised that MC let the queen's attack get so close to his sister, unless he's sure the situation is completely under control. For someone who hates working or studying, he put a lot of effort into this card collecting quest, and a giant robot.
Wonder if the artist is simply ignoring any consequences of MC's absence from this chapter, if the clone will show up later to disguise the absence, or if the artist is using the absence to give other characters (like the principal) another hint at Shiva's identity.