It had been a struggle on her own. When Kana first awoke four years ago, she was far away from her friends, and she was all alone. It took her a long time to accept that her friends, Yuzuriha, Taiju, and Senku, were all still stone. She wasn’t sure how she came out of her stone shell, or how it freed her, but it seems she was the only one left.

Four years later, Kana has grown immensely. Thanks to some of her friend’s teachings in the past, before the world turned to stone, she managed to reinvent things and materials. She had built a treehouse in the forest, had raised and trained a pet lion, and spent the last four years searching for her friends.

And, finally, after so long, she finds them

However, they were amidst a battle between Tsukasa and Senku. The kingdom of science vs the kingdom of might. As the kingdom of science, Senku’s team, had taken down Tsukasa’s army, the war wasn't over yet.

Tsukasa finally reveals himself, with his right hand man Hyoga standing beside him. They were faced against each other, Tsukasa and Senku only half a mile apart on the battle field. However, Hyoga holds his spear up, “You’ll thanks me later, Tsukasa,” he says gruffly before throwing the spear with speed towards Senku.

Nothing happens to Senku, however, when someone jumps in between them, hitting the spear away before it could even touch Senku.

Standing there was none other then Kana, in her leather-made clothes like everyone else, and a female lion standing beside her. Kana holds her spear out, ready for an attack.