Reaperraksh

Chihiro and Chiaki really do have extremely similar personalities/parallel suffering+response ->

they both start their stories separated from a happy, if slightly unconventional family (primarily represented by Kunishige).

Are pushed by death+disaster towards a duty they really don't want and depersonalize themselves to cope with (Chiaki burning kuni's letters and living as an unfeeling 'Princess'/political tool, Chihiro considering himself a monster who is going to hell), and,

feel an extreme sense of guilt and responsibility to make up for tragedies they aren't responsible for (the war and Irishima talks for Chiaki, the destruction caused by the Enchanted Blades and Hishaku for Chihiro) by sacrificing themselves

Like Chihiro "I am going to use myself as a lightning rod/let myself get impaled by a million pieces of paper/fight people I know are stronger than me/kill people even though I hate violence" is operating on the same selfsacrificial mindset as Chiaki, "I'll cut contact with the person I love /i'll volunteer for essentially torture and death"

basically,

Let's be passively suicidal with mama

Jokes aside,

OLD!

The ones that are fine: Hiroto, Shiba, Yoshinojo, Shuji, Akemura, Azami, Chiaki, Kunishige and baby napyuki.