The central tragedy of this episode is the demise of Kurusu. Throughout the series, Fourth was positioned as a moral anchor—a detective and ally. However, Episode 12 reveals the depths of his desperation:
A comparison of the version of the hospital standoff Mirai Nikki Episode 12
This episode marks a controversial shift in Yuki's character. For the first time, he drops his "whiny" persona—albeit briefly—to actively protect Yuno. The central tragedy of this episode is the demise of Kurusu
: When Kurusu takes Yuno hostage, Yuki’s diary predicts he will accidentally shoot her if he fires. Defying destiny, he proclaims his love for Yuno and pulls the trigger, managing to hit Kurusu instead. For the first time, he drops his "whiny"
If you want to dive deeper into why acts the way she does, I can help you break down: The symbolism of the "First World" vs. the "Second World"
For a deeper breakdown of the survival game mechanics and how they lead to these high-stakes confrontations, check out this retrospective:
: Akise Aru sends a warning to Yuki about Yuno's past, but Yuno "playfully" steals the phone and deletes it before Yuki can read it.