Check the challenge award. They put every character into “Complete all lore” now.
And yeah, getting other UPR in the team is the hardest one. Luckily, it doesn’t involve a win (I think, according to the description since it said nothing about winning) so surrendering might…be…an option.
Wish they tone it down to “Two others” because UPR has no support char to warrant having 4 of them at once. Picking Galiea already make Montana (and 90% other BB) go “Ehh why play them?”