Class Saiyasune de Urareta Ore wa, Jitsu wa Saikyou Parameter - Vol. 3 Ch. 12.2

[MangaDex]

 

[Thedying]

glad that guy is dead😮‍💨 (thank you for another chapter to read Artic)

 

[rexmundi]

death by fire

 

[Astra_Starwalker]

Golden = White with golden trimming.

 

[Jstar338]

Golden = White with golden trimming.

Nanami's is golden, and she's the one who stabbed the girl

 

[Astra_Starwalker]

Nanami's is golden, and she's the one who stabbed the girl

Ah, I see what happened.
Yui was fighting Yuuta, who's mecha is white with golden trimming, and I just assumed that mecha was whom she was referring to.
But Nanami, riding in a golden coated mecha, is the one that killed Emina, so Yui might have been referring to Nanami's golden coated mecha in the hopes of finding it so she can get revenge for Emina's death by killing the golden coated mecha's rider.