Giant Woman is the first episode of Steven Universe where Steven learns that fusion exists and we get introduced to Opal, the fusion between Pearl and Amethyst. Fusion is something every gem is able to do though not every single gem in the series had been fused with another gem, actually seen or mentioned to have been. Fusion is a big thing in the Steven Universe series and this is the episode that introduces it. That make it seem more important than the previous episode, Arcade Mania. This one introduces a topic that would be showed more throuGiant Womanghout the series while Arcade Mania doesn't really. And Giant Woman establishes more of the gems' relationship with each other.