Twiona

NightTwi is the het ship between Loid Forger and Fiona Frost from the Spy x Family fandom.

Canon
Fiona was trained under Twilight to become a spy. After he trained her to never show their true feelings, Fiona decided to "remain stone-faced for the rest of her life," and became a spy that didn't let their emotions get in the way of the mission. However, the more she worked alongside Twilight, the more she developed feelings for him. When Twilight was assigned Operation Strix, Fiona wished to work with him as his wife but was unavailable at the time due to another operation. Instead, she was placed in Berlint General Hospital to work undercover as an assistant to Loid Forger so she could provide him with information on missions. Now, she wishes to take down Yor’s possition as a wife and become Loid’s new wife. But she understood her plottings where going wrong when she went to the Forger residence, since Fiona watched as the Forgers bonded together and saw Loid smiling to them. Having observed his many disguises, she detected that this smile is at least genuine and clenches her fists. Fiona left but Loid went after her to give her the umbrella she forgot since it started raining and decided to walk her to the station, but when he saw her, Loid noticed Fiona’s sad expression, which she got grateful of the rain for hiding her true emotions.

Later on a mission both were asset together, they got in a tennis competition disguising as a married couple (proposed by Fiona) to get a painting they believed contained information about human experimentation by the East on prisoners of war and massacres committed by the West, since the winner could get anything from Cavi’s Campbell collection, where the painting was kept. In the tennis competition. In every game they had many difficulties since cheating was valid, so both had a rough time but could win. Fiona was playing roughly and her hand started to hurt, so Loid grabbed it and told her to be more careful, making Fiona starts to internally feel very happy. In the last game, they start getting even more problems because the floor starts moving and started stooting dards. One dard was going to hit Fiona, so he puts himself to protect her from the shot. At the end both won the tournament and got the painting, completing their mission.

In their way returning, Fiona and Loid meet Yor, Anya and Bond at a park. Fiona assumed that Yor must be a skilled tennis player and challenges her to a game. Loid tells Yor that she does not have to accept, but Yor accepted since she thinks he might replace her with Fiona. At the start of the game, Yor made a powerful swing and ended up slicing the ball to pieces, shocking Fiona. The second shot, Yor swinged the ball which moves faster than sound and in a perfectly straight line. Fiona tried her best to return the ball while thinking about how she must win for Loid but ultimately lost. Fiona fell to the ground in defeat and declared Yor the victor for now but swears to challenge her to a revenge match one day before driving away in tears. Later Loid met with Sylvia and asked her for Fiona, but Sylvia told him she didn’t say much and went straight to the mountains. Then we see Nightfall training with rackets made of rock scaring the animals around her.

Fanon
NightTwi isn’t a popular ship since Fiona hasn’t appeared in the anime yet, but this ship isn’t very supported because Fiona’s very obsessive over Loid, trying to interfere in Operation Strix and with the Forger family just to be Loid’s wife, even trying to make Yor renounce by making her feel bad. Despite that, there are fans that like this ship and gets supported since both met a long time ago and they’re working as spies to achieve the world peace. There are people that hope for Fiona to finally confess to Loid, and there are other that wish that at least she gets to have a good relationship with the Forgers specially with Yor, so Loid and Fiona could be in good terms and keep being fellow allies and friends. This ship normally rivals Yuriona.

Fandom
FAN FICTION

WIKIA
 * Fiona’s relationship with Loid on the Spy x Family wiki
 * Loid’s relationship with Fiona on the Spy x Family wiki