Andy took the elevator straight up to the 18th floor from the basement, making sure to try and have as little confrontation as possible.
Ren couldn't warp to the 18th floor, so he warped to the 17th floor, and went up one flight of stairs.
Ed didn't have a phone, so he was staying put.
"I am no one's blessing, I'll just bring you harm, I'm a cursed black cat, I'm an albatross, I'm a mirror broken, Sad to say, I'm your bad luck charm." - Bad Luck Charm - Jeff Williams (RWBY Volume 4 Soundtrack)