Amaterasu

is the First Pillar.

Appearance
Hitohashira Me appears as a naked woman with shoulder-length bright hair, who is regarded as resembling Iris in appearance.

Personality
As shown when she took control of Shinra, Hitohashira Me showed very manipulative behaviour. She used his resentment towards people branding him as a Devil, his anger at the Demon (his mother) that destroyed his family 12 years ago, and his confused emotions about the Infernal's true identity as a means of controlling of him.

Hitohashira Me's palpable hatred of humanity is felt by Shinra and noted by Haumea. While she controlled Shinra, she tried to convoke him to burn and kill everything and everyone in their path.

Netherworld arc
When Shinra Kusakabe sleeps before his journey into the Netherworld, Hitohashira Me appears before him in a dream. He is momentarily awakened by a small earthquake and is confused by the dream, believing that the woman was Iris.

VS. Special Fire Force Company 4 arc
Upon Shinra meeting Sōichirō Arg, Hitohashira Me connects with Shinra through the Adolla Link, telling him kill Company 4's captain and to let the anger he once directed at the Demon explode. Shinra asks her what she is before snapping back to reality. When Shinra's conversation with Sōichirō is interrupted by a controlled Karin, who says he will kill Shinra, Hitohashira Me appears once again. Telling Shinra to kill Karin as a means of releasing his anger, seemingly taking control of the young officer with the Adolla Link. This leads to them fighting Captain Arg, who successfully manages to force the rabid Shinra outside. While the battle continues, Hitohashirame promises Shinra that they will kill anyone who gets in their way. The battle seems to be in the Adolla pair's favour, until Arthur and Ogun intervene.

Arthur manages to sense Hitohashirame's presence, although the knight has no idea how to free Shinra from her control. Arthur, Ogun, Arg and Pan all move to engage the possessed Shinra, with Arthur using Captain Arg as a human shield against the devil's more powerful blows until he collapses. As Arthur readies to fight Shinra alone, Hitohashirame tells Shinra not to worry about being a hero or a devil. The spirit then offers to tell him where his mother can be found, but only if he kills his opponents.

As Shinra and Arthur re-engage, Arthur continues to counter Shinra's confused arguments for becoming a Devil much to Hitohashirame's fury. This fury presses her and Shinra rushing in to finish Arthur, who counters with a barrage of strikes before finally telling Shinra to embrace being a hero once again to protect what he loves. Hitohashirame once again pushes Shinra to kill the Knight, claiming that being a killer is much simpler than losing those you love, but Shinra manages to break out from her control.

While Hitohashirame expresses disappointed by Shinra's unwillingness to kill, says she has enjoyed herself. When Shinra asks about his mother, Hitohashirame refuses to tell him anything as he rejected her offer. Instead, the spectre chooses to play with the fifth and latest person to awaken the Adolla Burst.

Fifth Pillar arc
While Inka discusses her love of danger, Hitohashira Me appears to tell Inka that she'll soon face a danger so great it will make her fall in love. Inka turns to confront the spectre but Hitohashira Me disappears.

Chinese Peninsula arc
After it is revealed that the Black Lady was inside the Shintai, and that a human sacrifice is needed in order for the Amaterasu to function, Shinra comes to the conclusion that Hitohashira Me is actually inside the Amaterasu in Tokyo. On the team's way back to Tokyo after their expedition in the Chinese Peninsula, Shinra dreams of Hitohashira Me surrounded by Adora Burst flames, saying that she is actually Amaterasu itself.