Commander William T. Riker (Jonathan Frakes) killed one of his love interests on Star Trek: The Next Generation and her death felt unnecessary and out of character. Throughout TNG, Riker gained a reputation as a bit of a ladies’ man, taking after Captain James T. Kirk (William Shatner) on Star Trek: The Original Series. As First Officer on the USS Enterprise-D, Commander Riker often went on away missions and commanded the Enterprise when Captain Jean-Luc Picard (Patrick Stewart) was otherwise occupied. Level-headed and not prone to violence, Riker usually made well-thought-out decisions, making his choices in one TNG episode particularly surprising.
https://screenrant.com/star-trek-tng-riker-killed-love-interest-unnecessary/