Yup! You can even have multiple non-robotic characters contained in a relationship, so long as they are in a relationship with at least one robotic character.
(For example: Alice and Bob are a human couple, and Betty is the AI of the smart toaster they bought as a last minute anniversary present. You can nominate Betty, Betty/Bob, Betty/Alice, and Betty/Bob/Alice. Or replace any of those slashes with &s for a platonic relationship.)
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(For example: Alice and Bob are a human couple, and Betty is the AI of the smart toaster they bought as a last minute anniversary present. You can nominate Betty, Betty/Bob, Betty/Alice, and Betty/Bob/Alice. Or replace any of those slashes with &s for a platonic relationship.)