After everyone held their 'speech' about Jura, adding a shovel of dirt onto the casket each time, Eiro chose to finish up closing it on his own while the others went back inside.
There wasn't any specific reason why he wanted to do it alone, he just didn't want the children to have to do it, and Eiro slowly made his way inside after he was done, and just quietly slipped out of his shoes and took the old mask out of his storage, replacing it with the new one he had been wearing on his face, before he rubbed the bridge of his nose inbetween his eyes and stared at his satchel, slowly opening it up again.
