相棒

No, usually not. Aibo (相棒) is a partner based on close friendship. You share a common goal with your aibo and work together toward that goal.

This word can be used in professional or non-professional relationships. It sounds slightly old-fashioned, and it is not frequently used in everyday conversations, but it may be because people want to reserve this word for special friends.

Having said that, I think it is possible for some people to call their romantic partner aibo, depending on the style of their relationship or language use.