Why didn't Otonashi disappear like the rest of the characters?

Kanade received Otonashi's heart to keep living, but why is she in the afterlife?

Did Otonashi and Kanade retain their memories of the afterlife? Does that mean they can continue their friendship?

Hi! I'm here to share my short edit of the Angel Beats group I organized this year, I hope you like it!

ph: @giaquintamarzio_ph

edit: by me

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Otonashi🍂 @arisen.png

Kanade 🪽 @samechan_cos

Yuri 🔫 @dearlycoris

Hinata ⚾ @bekkynalex

Ayato 🥀 @kaikirunenjoyer

Yui 🎙️@tsukitsu__

Iwasawa 🎤 @reira_nanami

Shiori 🎸 @shimamecosplay

Miyuki 🥁 @dinkytea

Shiina 🥷 @ki.inari

Yusa 🕴️@hikaru_pyon_

Is this an AI mistake or that guy is really Matsushita Godan?

After completing the five Girls Dead Monster portraits, I’m continuing through the Angel Beats! cast with Nakamura Yuri.
I focused on her steady gaze, slight smile, and recognizable headband-and-ribbon silhouette. Traditional ink style study inspired by Ratatatat74.
How well did I capture Yuri’s expression?

source!

The fifth and final portrait in my Girls Dead Monster series!
With Yui finished, the complete hand-drawn set now includes Iwasawa, Hisako, Sekine, Irie, and Yui. For this one, I opened the eyes wider and pushed the energetic smile to distinguish Yui from the more restrained expressions in the previous portraits.
Traditional ink style study inspired by Ratatatat74. I plan to photograph the complete five-member set together next.

My latest hand-drawn Angel Beats! portrait: Miyuki Irie of Girls Dead Monster.
I focused on her half-lidded eyes, restrained expression, and the long hair framing her face. Traditional ink style study inspired by Ratatatat74.
How do the eye alignment and expression read?

Im so confused with the order and number of the mangas, spin offs, Ovas, extra, CDs, and more. If someone could help me with this that would be great. Sorry for such a vague request but I seriously dont know the details.

My latest hand-drawn Angel Beats! portrait. I focused on Sekine’s half-lidded eyes, cheerful expression, and layered hair shapes.
Traditional ink style study inspired by Ratatatat74. I’m still improving my facial construction—how do the eye alignment and expression read?