Evangelion is extremely popular in Japan, everybody and their dog knows it, so it is obviously the second option. From the official app website, https://nerv.app/en/
> The name and logo of "NERV" are used with the explicit permission of khara Inc., the copyright holder of the "Evangelion" series, and Groundworks Corporation, which manages the rights to the series.
Evangelion is extremely popular in Japan, everybody and their dog knows it, so it is obviously the second option. From the official app website, https://nerv.app/en/
> The name and logo of "NERV" are used with the explicit permission of khara Inc., the copyright holder of the "Evangelion" series, and Groundworks Corporation, which manages the rights to the series.