[It's impossible to tell he's bothered in his puppy form, but like this Ren looks flustered and like he doesn't know how to accept the compliment. Even if it is just for the All Mate he took over.]

Ah... The animal type All Mates are designed to be aesthetically pleasing, so they are usually cute or pretty. Ones designed for labor usually look more robotic, since they aren't intended to be pets as well as All Mates.