The red knight would always walk up to him, each time he entered the realms of shadow to ask him about his progress with his Divine cultivation method.
However, it was always surprised by Ainz's progress, and always thought its master was a monsterous genius even among monsterous genius, and unless Ainz needed it, it never bothered to disturb him during his cultivation period.
Ainz nodded at its attitude, compared to what he was expecting the red knight was more understanding and intelligent than his other shadow puppets.
Ainz thought, it was likely due to their compatibility thanks to the red knight being a shadow element cultivator before its death, it was needless to say the fact they shared one particular element in common made Ainz to improve extremely quickly, even though the red knight didn't go all out while they spar, Ainz would always go all out to test his limit.