I feel like the Tokyo Ghoul anime made Tsukiyama not be appreciated by people as he really should be, and his emotions for Kaneki beyond seeing him as food felt forced, Root A ruined his character, let me explain:
Tsukiyama became interested in Kaneki due to the aroma, yearning to eat him, and approached him at Kamii University, lured Kaneki to the ghoul restaurant ghoul restaurant, then kidnapped Kimi and lured him to the church, all with the intention of eating him.
The problem starts in the 2nd season, Kaneki, who was kidnapped by Aogiri and tortured by Jason, Anteiku ghouls, Tsukiyama and Uta, went to rescue Kaneki, Shuu still has a great interest in eating Kaneki.
After Kaneki leaves, he became a member of Aogiri, but in the manga, he forms a group with Banjou, Hinami, Sante, Jiro, Ichimi, and obviously: Tsukiyama.
Tsukiyama offered to be Kaneki's "sword", he prepared the hideout, helped Kaneki with information and missions, they trained together, they became really close. Tsukiyama's feelings changing perspective and he became attached to Kaneki much more than just being his food, he used Hinami to try to gain Ken's trust, but it was just a pretext, he really cared about him and wanted to make him happy.
Kaneki said that being with Tsukiyama wasn't that bad and he was actually touched by his words because his feelings for Kaneki grew.
And we arrive at the fateful moment where Tsukiyama tries to stop Kaneki from going after the CCG to protect Anteiku and who he loves, he was very afraid of losing him, but not because Kaneki was his food, but because Shuu loves him.
Root A took away significant parts of Kaneki and Tsukiyama's relationship, in just a few episodes, Tsukiyama didn't spend enough time with Kaneki, in one episode, he seemed to try to get closer to Hinami to gain Kaneki's trust (who was at Aogiri), and soon after, he appeared crying, begging him not to go. It seemed like Tsukiyama just didn't want to lose his precious food. And later, in Tokyo Ghoul: Re, Tsukiyama becomes deeply depressed because he thinks Kaneki has died, leaving everything extremely shallow. They didn't spend enough time together because Kaneki went to Aogiri. anime onlys thinks that Tsukiyama felt bad about "losing his food", they ruined his character, and as a Shuu fan, it makes me very angry, they even animated a flashback that Tsukiyama had "about those happy days with Kaneki", what days? Never happened, all these moments were deleted, that's the problem, in the anime, they were never as close as in the manga and to this day people who have seen the anime still think wrong about Shuu, they even believe in their redemption, after having gone through everything, but it still raises doubts, because it was not sufficiently in-depth as in the original material.
