@Damoc They were Kakushi of the same names, in the most recent arc Goto was the one that helped Kanao and drove a car into Muzan. Takeuchi was the one who suggested that Yushiro eat him so that he could regain his strength and keep helping in the delay-fight against Muzan.
@IsaacBai
The second spy is from the same kingdom as the first spy, just that the first spy was sent by the bordering Count, whilst the ninja looking fellow was sent by the King of that country.