WARNING: INFINITY CASTLE MOVIE 1 SPOILERS
Front view:

Back view:

View from above: 
Colors of the shulkers and their respective characters and easter eggs:
Firstly, all the demon slayers that have the kanji ¨Metsu¨ ( 滅 ) on their uniform will have it on the bottom face of the shulker.
Metsu (滅) means destroy, and it symbolizes the destruction of demons.
The series name contains this kanji: ¨Kimetsu no Yaiba¨, which means: ¨The blade destructor of demons¨.
-Green: Tanjiro Kamado: It has his demon slayer mark as a completed sun.

-Pink: Nezuko Kamado: Has a completed sun just like his brother on the top face, has a bamboo on the inside and also her mother's haori is hidden in the box.

-Yellow: Zenitsu Agatsuma.

-Gray: Inosuke Hashibira: Has a hidden tail in the back face.

-Brown: Nezuko's Wooden Box: Personally, my favorite Shulker.

-Light Blue: Sakonji Urokodaki: Urokodaki's mask is on the inside.

-Blue: Giyu Tomioka: Has his demon slayer mark in the right face (It should be in the left side but it looks better on the red part).
Giyu's demon slayer mark is blue as his eyes for aesthetics purposes.

-Purple: Shinobu and Kanae Kocho: Since its the same haori, it is for both sisters. Has Douma's red stain in the top face and, above it, you can see a mix between Shinobu's and Kanae's butterflies.

-Orange: Kyojuro Rengoku: Has Kyojuro's sword flame guard on the top face.

-Red: Tengen Uzui: The decoration is Tengen's makeup on his left eye.

-Cyan: Muichiro Tokito: Has his three marks on the main face just as Muichiro, but also has Yuichiro's print colors.
Muichiro's demon slayer marks are cyan as Yuichiro's print colors for aesthetics purposes.

-Magenta: Mitsuri Kanroji: Its a bowl full of Sakura Mochis with the same pattern of Mitsuri´s socks decorated with her demon slayer mark in all the side faces.
Mitsuri's demon slayer marks are pink as her hair for aesthetics purposes.

-Black: Obanai Iguro: Has Kaburamaru on the top face with Obanai's eye colors.

-Light Gray: Sanemi Shinazugawa: Has Sanemi's Scars on the face (Front face of the Shulker) and on the chest (Back face of the Shulker). The kanji on the top face is ¨Satsu¨ ( 殺 ) , different from all the other uniform kanjis ¨Metsu¨ ( 滅 ). Satsu means the same as Metsu: Destroy, but Satsu is a very more aggresive way of saying it, specifically it is like kill or murder.

-Lime: Gyomei Himejima: All of the kanjis of Gyomei´s Haori together say ¨Namu Amida Butsu¨ ( 南無阿弥陀仏 ) that means ¨May Buddha have mercy on you¨.
Separately, the kanjis means things completely different from the prayer except for the kanji Buddha ( 仏 ), that, if you place the block on the floor, it will always face north. Also, there is the kanji ¨南¨ which means south, and, if you place the block on the floor, it will always face south.
Gyomei's rosary is on the top face.

-White: Kagaya Ubuyashiki: Has on the inside the volleyball which his daughters played with before dying because of the explosion.


