Draw my oc in your style ​​and you can try making it human or more monsters or specific style

You'd have to give me options to choose from before i can answer you.

It depends on what type of third separates the three notes.for example: if you have two mayor thirds is an "aumented chord"if you have two minor thirds is an "diminued chord"if you have one mayor first and then one minor is a "mayor chord"and inverted is a "minor chord"

Opposition of two melodic ideas is the  right answer 

Dobrý den, nevím přesně, ale možná je to pop a další