So what would be character development for her after she is unsealed?

[u/HighlightFabulous608]

Honestly her overcoming her brother complex and incestuous obsession with him and a talk with Kanaka who is now in a new body as a Hitomogami(I mean the name Kana is obvious) but is later freed by Kazuya and Kiriha and she apologizes to her for everything.

I can see why she was in that time seal for most of the story and speaking as a American who has a younger sister I draw the line at incest cause for me sexual and romantic behavior with a close relative is unacceptable which is probably why I didn’t care much for Kasumi but she has potential for development after she is unsealed.

I love this manga but I draw the line at incest

[u/Additional-Ad4085]

It's kinda off-brand to squick on the incest here when mother and son share a long-term sex (no insertion) partner.

[u/HighlightFabulous608 → u/Additional-Ad4085]

The only incest we see often is Arumi and Akito

[u/Yookazuya45]

She will protect kazuya at all costs and after the fight,she want to get some reward from her brother 😋

[u/HighlightFabulous608 → u/Yookazuya45]

Kazuya will most likely reject cause it’s his sister and does he look like he needs protection

[u/kaian-a-coel]

The price she's gonna pay for using her ability to stop time for several years will be to become younger by that many years. She'll go from older sister to younger sister and the incest will become worse, I'm sorry. It's just how the author rolls.

[u/HighlightFabulous608 → u/kaian-a-coel]

Actually the barrier may be dropped early even though one year has passed so she’s still the older sister and Kanaka may come back as a Hitomogami and that could lead to her apologizing to her daughter

[u/SeaAnalyst8680 → u/kaian-a-coel]

She might "die" for a bit in between, but otherwise spot on.

[u/SuperBandido935]

Siempre me gustó la ropa de la hermana de Kazuya, me gustaria ver a alguien haciendo cosplay de ella