Does Sett, Kingpin count himself when his ability references 'friendly units'?

Ruling: Yes, Sett, Kingpin counts himself when his ability references "friendly units."

Nuances:

• Cards that use the term "other friendly units" (like Darius, Executioner) explicitly exclude themselves, which implies that "friendly units" without "other" includes the unit itself
• If a card needs to exclude itself from an effect, it will specifically use the word "other"