Square Enix announced that SINoALICE will see a NieR Reincarnation crossover event appear on May 23, 2022. However, characters from throughout the NieR series will appear as part of the crossover. This includes characters that were available to obtain through the NieR Replicant and NieR: Automata crossover events. They will reappear at the same time NieR Reincarnation characters will appear in SINoALICE as part of the crossover.
The characters from NieR Reincarnation that will be available to obtain are 2P (Paladin) and Fio & Mama (Crusher). Square Enix has shared artwork of how the two characters will appear in SINoALICE. 2P is seen wielding some kind of spear, whereas Fio is joined by Mama and has a floating ball and chain behind her. This is similar to the weapons these characters can wield in NieR Reincarnation.
You can take a look below.
— SINoALICE ーシノアリスー (@sinoalice_jp) May 20, 2022
Other characters from previous NieR series crossovers players can obtain during the event period include Brother NieR (Paladin) and 2B (Breaker). Players who initially missed the NieR Replicant and NieR: Automata crossover event stories will have the opportunity to experience them.
SINoALICE and NieR Reincarnation are both available for Android and iOS devices. The crossover event will appear on May 23, 2022, on the Japanese client of the game.