Demon Slayer Season 2 Episode 13, “Layered Memories” is an action packed episode that adds to the lore of demons and may have exposed Muzan’s only weakness. Daki gains more power as her obi sashes are absorbed. Her hair changes white, as she get excited at the prospect of facing another Hashira. She ignores Tanjiro who’s already struggling psychically. After she destroys part of a city block, killing several people and maiming another. Tanjiro is also cut deeply trying to reflect her attack. Witnessing the carnage Daki created and her indifference to the suffering, Tanjiro explodes with rage.

Demons have nothing to lose
Daki tries to escape but Tanjiro grabs her by the leg, attempting to decapitate her. She evades, only losing her foot. Like most demons at her level she quickly heals. Demon Slayer has consistently made the point that humans are at a natural disadvantage against demons. Tanjiro has always felt like he was struggling against the more powerful Daki. He constantly under pressure, pushing his body past its natural limits just to inflict pain on the Upper Demon. Bloodshot and determined, Tanjiro accelerates towards Daki. She uses Blood Demon Art: Eight-Layered Obi Slash trying to cut Tanjiro into pieces.
Tanjiro uses Hinokami Kagura: Burning Bones, Summer Sun, creating a series of circular flame spirals. Daki feels pain from the burning and cannot regenerate quickly. Daki leaps to another house, wondering how Tanjiro can still move. Following the demon, Tanjiro manages to cut Daki’s neck, but she protects herself using a soft sash. Feeling the heat, she increases her sashes to 13. Tanjiro is able to easily parry them as they appear to move slowly. He stabs all the obis, pinning them down. With explosive movement, he leaps into the air slashing the obi with fiery strikes. It’s an amazing moment that displays what makes Demon Slayer such an amazing series, beautiful animation, colorful design, and impressive action.
The evolution of Nezuko
Nezuko occupies a strange position in the Demon Slayer series. She not a very active character. She’s literally muzzled and sleeping in a box most of the time. Nezuko is often out of sight and out of mind. Obviously, she can’t walk around during the day but she could come out at night. If we consider the fact that most humans are ignorant of demons existence and their white skin doesn’t trigger too much suspicion (Muzan claims he has a special disease) there’s no reason for her to be so absent. Especially, because she protects Tanjiro more than her protects her. Anyway, that trend continues.
Tanjiro apparently stopped breathing while he was fighting and just before he decapitates Daki, he’s stopped by a vision of his sister telling him “to breathe.” Tanjiro collapses in agony, giving Daki a chance to capitalize. Suddenly, Nezuko appears behind her and crushes Daki’s head while sending the demon flying. Nezuko attacks Daki with her trademark right kick. Daki slices off her leg, arm, and cuts deep into her torso. Nezuko has never eaten a human and hasn’t developed in the normal way demon tend to.
Like Tamayo, Nezuko escapes the control Muzan exerts on his progeny. Regardless, Nezuko begins to regenerate, according to Daki at “a Upper Demon level,” develops vinelike markings and grows a horn. She stomps Daki into the ground giving her a menacing stare. Nezuko shouldn’t have this much power especially considering she doesn’t train at all. It conflicts with the painful effort demon slayers like Tanjiro put into their breathing. Granted she’s a demon so they generally have it easier than humans. However, she doesn’t even have to consume humans like those demons.
Marks, Scars, and Cells
Demon Slayer Episode 13 introduces the more subtle aspects of the power system of the series, marks, scars, and cells. When Muzan creates a demon he gives a human his blood, this process is “performed at a cellular level.” Normally, Muzan maintains control over demons, but for some reason Nezuko and Tamayo can’t be controlled. One thing they both refused to do is eat humans which is likely the main reason. In this episode, Shinjuro Rengoku writes Tanjiro a letter in which he explains that Sun Breathing users have a “red mark on their forehead.” While Tanjiro denies he’s the “chosen one” claiming that he got the scar through other means, I think Shinjuro is one to something. Especially after we witness the memories of Muzan. The man in the vision has the mark Shinjuro referred to.
I don’t know who the man in the vision was but I don’t think it was Tanjiro’s father. Maybe a grandfather? It doesn’t matter. What is important to know is that Muzan was afraid of this Demon Slayer, who like Tanjiro can use Sun Breathing. Nezuko’s markings are only seen, but it’s obvious they’re associated with her transformation. I expect we’ll get more information next episode. This episode was great. While Nezuko’s transformation is a bit of an ass pull, I’m still excited to see her fight.