Shigeru is the 5th born in the Kamado family. He was finally allowed to go with Tanjiro to the market, though he kept Tanjiro there longer than he should have after they slept at old man Saburo’s house for the night..

When he and Tanjiro got home, everyone else has been slaughtered, even Nezuko (because they stayed out so late, Nezuko had bled to death.)

They had their interaction with Giyuu and they went to Urokodaki’s place so Tanjiro can become a demon slayer to avenge his family. You are a helper that lives with Urokodaki and you take care of Shigeru while Tanjiro is at Final Selection for the week.