Actually, Gawain intended to call Rebecca too, but she had been busy with the construction of 'Magic Web 1' and hadn't had a good rest for many days. She was finally able to rest a little earlier today; thus, Gawain didn't wake her up.
In any case, an additional Fireball launcher wouldn't be of much use either… It wouldn't even be as powerful as Gawain slashing someone himself.
Heidi had yet to rest. She was still studying the systems and the plans that Gawain had written. After hearing that there was a problem in the treasure vault in the mountains, she immediately put on her coat and rushed over.
Seeing that she was a little anxious, Gawain consoled her, "Don't panic. It was just some abnormal noises. Perhaps some of the ancient facilities in the remnants had budged… If it was really going to collapse, the noises wouldn't be that subtle."
Heidi nodded with a deeply worried face.