The -Daj doesn't work here. You're basically saying The soldier hates his Torg's robot.
-Daj doesn't work like 's in English. It's more like his/her/its. torghDaj means his Torg.
To translate English 's, you usually use what's known as a noun-noun construction: you put the possessor noun in front and the noun possessed after it. torgh qoq Torg's robot.