Harry should certainly say to Lesath: “I am not your Lord and I did not free your mother from Azkaban, but since you wrongly believe that I am and did, here are my orders for you, which you will notice benefit you and not me.”
Snape was the one who originally introduced Harry to Lesath with the intention of helping Lesath (at least, he didn’t mind that Harry helped him). He wouldn’t be surprised if Harry reacted this way.
Harry should certainly say to Lesath: “I am not your Lord and I did not free your mother from Azkaban, but since you wrongly believe that I am and did, here are my orders for you, which you will notice benefit you and not me.”
Snape was the one who originally introduced Harry to Lesath with the intention of helping Lesath (at least, he didn’t mind that Harry helped him). He wouldn’t be surprised if Harry reacted this way.