Alfred

As if a monster's maw was forcibly being opened, the giant gash in the Calamity Spider's surface refused to close in. Runes worked and glowed to move the gears and metal plates into place, but Arthur's authority prevented them from doing so. The runes that had held them in place were broken apart as if a paint that was washed off. 

The mecha climbed the Spider's leg while making dents in them, sometimes using the jets to propel itself forward. When Arthur stepped into the gash, he saw that runes were glowing from far away, fire runes to be specific. 

Like a dragon coming from the pits of hell, the fire spread in the gash completely before blowing the mecha away, burned black. However, Arthur and the rest were already standing inside the calamity spider with a tired Zas on the side.

"Are you okay?" Ivy asked Zas who nodded as he was helped to stand by Li.