Q
Is the condition "If you swapped in a (SHADE) character this turn" on (SHADE) characters' effects met when they're swapped by my opponent's NIRA-CHAN (Hippocampal Pain)
?
A
No, the condition isn't met in that case.
"If you swapped in a (SHADE) character this turn" means when you did the swap yourself. So even if your character card was swapped by NIRA-CHAN (Hippocampal Pain), effects with the condition "If you swapped in a (SHADE) character this turn" can't take effect unless you swapped in a (SHADE) character yourself this turn.