There she is, floating in a void surrounded by never ending amount of quirks that exists... (which is urm, 8 billion) some broken, some fixed, and some are too much.... soooo her job is to.... fix and edit those quirk because... that's her quirk. To edit, fuse, take, use or give quirks. But she though she died and this is her after life which is not true, she's actually in a coma! After the final war in mha chapter 420.

she saw one that looks like it's fading... OFA... specifically Izuku's OFA.... she... she realized that's his ember... he's turning quirkless and there's nothing she can do but to sacrifice other quirks to fix Izuku's OFA... so she had no choice but to watch is fade... slowly everyday...***

ANYWAY! Kasan felt something holding her hand... a human figure of green that looks like izuku...

In Izuku's perspective he was holding Kasan's hand when she's unconscious body on the hospital bed....

back to Kasan's perspective, she's confused very confused, she doesn't know know happening she tries to move her hand but it won't budge, she tries to touch the figure with her other hand, it went right through