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Kurumi: Alternate Self-Absorption
Kurumi doesn't absorb alternate timeline versions of herself, her clones are simply herself from the past. here is proof from the date a live wiki-
"Combined with the power of the 8th bullet, she can create a clone that has all her experiences, memories, abilities, etc., these clones can take the form of long white hands with red outlining when they are in Kurumi's shadows. However, as these are her past selves, they sometimes may contain feelings which the current Kurumi no longer possesses and as such, Kurumi will not hesitate to kill these clones if they choose to disobey her."