Harvey and Donna make a great team on "Suits." Donna sometimes uses innuendo and winking to poke fun at Harvey and the women he takes home with him, as she did in the episode "Play the Man." But does that mean Harvey and Donna would make a good couple? Probably not.
Donna knows way too much about Harvey.
Donna has proven that she knows everything about the way Harvey operates. She often finishes his sentences. She knows his daily routine. She knows how he will react in various situations. In a romantic relationship, that knowledge would put Harvey at a disadvantage. The character would have to change, and it's not clear whether viewers would be happy about that.
They're both alphas.
Harvey always wants to get his way. Donna is the only person who ever goes against Harvey's wishes. Even when Harvey specifically tells Donna not to do something she believes is right, such as in the episode "Dog Fight," she'll do it anyway. A relationship between these two alphas would likely be explosive. Their humorous back-and-forth one-liners could be lost to bickering and constant fighting.
Donna would have to quit her job.
Harvey and Donna would not be able to work together. It would not matter whether things worked out well between them. They would not be able to get any work done if things went well, and they would not be able to communicate effectively if the relationship failed.
Harvey has consistently relied on Donna to handle all of the things he is too busy to think about. He clearly needs Donna to be his assistant much more than he needs her to be his girlfriend. The current relationship between them is entertaining and hilarious to watch, which means the viewers also need Donna more as an assistant than as a girlfriend who would rarely be seen.
The office gossip would be severe.
Even if Donna were to quit her job, the gossip would never end. The office already partakes in gossip, thanks to Louis. Louis loves to tell everyone everything he knows about everyone else in the office, to an inappropriate degree. The one-liners would never quit, although funny one-liners would probably be the only good thing about a relationship between Harvey and Donna, just for the entertainment value.
Harvey is not a one-woman man.
Harvey sleeps with different women all the time. Several episodes in Season 1, including the "Pilot," showed the ease with which he picks up new women and takes them to bed. Donna, being an alpha, would never stand for it.
- Arts & Entertainment