Both if you ask me, but mainly Drive Knight

Why Drive Knight? Drive Knight did the right thing dropping Genos. I take it that Psyorochi’s cells were taken as a sample by Drive Knight. He fought so much that if he saw a monster association cadre attacking him, he would die. So, he dropped Genos where the S Class heroes were, and took off, so he could examine the sample. I think Psykorochi’s cells (mainly Orochi’s) could be part of some cadres, and surely Drive Knight will come back with a weakness to defeat the cadres.

I think they are part of the organisation for sure. Drive Knight sus in webcomic, and is obsessed with collecting samples just like G4 and G5.

Didn't we have a poll just like this recently...?

Neither

I think Drive Knight. Not only is his face similar to G5 but G5 was also shown to be antagonistic towards Metal Knight I believe. Other than that, it's mainly a gut feeling for me. Metal Knight's attitude towards the MA, his relationship with CE, etc.

Metal Knight is definitely doing some shady stuff and is selfish. But I feel like he's getting too much out of the Hero Association (money, power, technology) to just betray them

He stole technology from the military

Drive knights is the rat and the both of them should be apart of genos

Metal Knight is.