As one of the only survivors on Genosha, Emma is found in her diamond form, cradling the body of a dead mutant. That’s her second mutation, and the first time we see her as diamond. In her diamond form, she says, “…I saw children cut into wafer-thin slices. I watched a gifted ten-year-old pianist search for his hands among the broken glass. That monster must die.” She then ends up twisting Cassandra’s neck around and joining the X-Men.
NEW X-MEN is one of my favorite runs of comics. There’s so much to talk about and it’s weird and wild and sad and fun and sexy. We’re introduced to the Stepford Cuckoos and the psychic/love affair between Emma and Cyclops begins. She becomes a core member of the X-Men and a major teacher at the school. NEW X-MEN #139 is a key Emma issue. Jean—and the Phoenix—confront Emma about the affair. Jean goes digging around in Emma’s head, letting us see tons of Emma’s history—childhood, family, the Hellfire Club, the guilt around all her dead students, and more. We find out the real truth of the affair, hear Emma’s admitted love of Scott Summers, and find her shattered into diamond pieces by the end. Also, it is gorgeous! Phil Jimenez was just on some next level business.
Jean puts Emma together again, and throughout NEW X-MEN, Jean dies, and Scott and Emma become a thing. We then roll into ASTONISHING X-MEN and more where Emma and Scott run the school together, Emma and Kitty once again are connected and also somewhat perpetually at odds. Around that time, Emma puts together another team of Hellions—she just wants to teach and help.
It’s revealed that the Cuckoos were clones of Emma, and that Emma was intended to be a weapon against the X-Men by Cassandra Nova, but she ended up being a force for good with the team. Later, during the Dark Reign storyline, which was after Civil War and Secret Invasion, Emma joined Norman’s evil Cabal. Also, we learn about her and Sexy Namor’s sexy times. Emma shows her true colors under Osborn, though, and reveals she and Namor are on the side of mutant freedom. Flipping against Osborn and the Dark teams, Emma, Scott Summers, and Namor help establish the mutant safe haven of Utopia.