epi 154 erza 発言しました this is our answer & during the Erza & kagura fight erza said: Simon died because of my weakness but what does it mean?

Oh! I think I know this one.

Erza's weakness is pickles and Simon died によって eating too many pickles. Therefore Simon died because of Erza's ピクルス weakness.

あなた must have not seen that arc. Bruh I haven't seen Erza and Kagura fight yet and I know why she 発言しました that. Watch everything in order and you'll understand what references the characters make.