Yeah, looking up the novels is best. They might have done her better than the cartoon fluff that "Unification II" loaded her with. A shame as Sela had great potential to be a recurring threat, especially with Tomalak gone incognito over at Babylon 5 and all.
But, she had a great and unique origin that was brilliant that ultimately descended into levels of camp approaching "Lost in Space". Later Romulan episodes could have mentioned she was sentenced to death, or given false information, etc, to write her out if the intent was to only have her back for a sweeps week "extravaganza". Even her senseless death by Armus wasn't anything as hokey as that quiet ending, never mind some of the scenes, such as:
More camp than at a tent and hunting surplus store, right down to even Data feeling out of character and that's before the neck pinch nudge-nudge wink moment because all the TOS fans who disliked TNG at the time said "Data is just a copy of Spock"). Where's the cartoon fowl yelling "beep beep" as they leave at the end?
Not to worry, it gets better:
Cool green lamp, though, and I'll admit I chuckled when Sela mentioned "unnecessarily long words" (good acting, not the corny scene unworthy of TNG (even during season 1, which was never as outright ha-ha-bonk like this). That aside, Sela was menacing before, needed to be menacing here to keep the sweeps week extravaganza from imploding (which it did as the story received mixed reviews on original airing) but now she may as well be doing bits on "Laugh-In" as the script should be taking itself seriously if it's supposed to be as epic as all that... Sela isn't the only character turned into a prop and/or a butt of a joke.
Add in "cowboy diplomacy" homage to TOS, and "Legacy" did that a heck of a lot better too.
Speaking of "Laugh-In":
Course, that's tons better than this episode regardless, but I digress.