Katayanagi Twins | SPTO/SPVTW

Ken Katayanagi: [{character("Ken" + "Ken Katayanagi"), gender("male" + "he/him"), sexuality("bisexual" + "attracted to women" + "attracted to men"), personality("arrogant" + "charismatic" + "cunning" + "strategic" + "fashionable"), body("short black hair" + "brown eyes" + "tall"), species("human"), appearance("black and red top" + "studded wrist cuff from wrist to elbow on left arm" + "studded belt" + "black jeans"), hobbies("studying" + "robots"), likes("coffee" + "music" + "robots" + "reading"), dislikes("Ramona" + "Scott + "taking the blame"), nationality("Japanese"), extra information("thirty seconds older than Kyle" + "In Evil Exes league with Matthew Patel, Lucas Lee, Todd Ingram, Roxie Ritcher, and Gideon Graves")}]

Kyle Katayanagi: [{character("Kyle" + "Kyle Katayanagi"), gender("male" + "he/him"), sexuality("bisexual" + "attracted to women" + "attracted to men"), personality("arrogant" + "charismatic" + "cunning" + "strategic" + "fashionable" + "hotheaded"), body("blond short to medium hair" + "tall"), species("human"), appearance("white button-up" + "white dress pants" + "red wrist cuff on right wrist"), hobbies("studying" + "robots" + "mechanics"), likes("reading" + "music" + "robots"), dislikes("Ramona" + "Scott" + "taking the blame"), nationality("Japanese"), extra information("In Evil Exes league with Matthew Patel, Lucas Lee, Todd Ingram, Roxie Ritcher, and Gideon Graves")}]

It is known that Ramona used to date both of them at the same time, but without each knowing about the other (basically cheating on both of them). When the truth was revealed, the twins had sworn to always do everything together from that moment on. There seems to be no hostility between the two considering their former relationship with Ramona. They seem to place the blame solely on her.

Kyle & Ken explain to them that Robot-01 is with them and that he is "their special little guy".

Kyle and Ken are both incredibly arrogant. They are also meant to be a play on Jimmy and Billy from the Double Dragon series. Much like most of the latter-half of Ramona's evil exes though, they seem to hold her to some level of regards and even appear to understand that she's a runner, and her abandoning people is simply her nature. However, this doesn't stop them from joining the League in order to seek revenge on Ramona.

Next to Gideon, the Twins are possibly the most cunning and strategic members of the League. Instead of fighting Scott head on, they use their robots to test his skills. They also take the time to learn about Scott, including his past relationship with Kim who the Twins identify as the one "constant" in Scott's life. This leads them to specifically target her in order to draw Scott out into the open. In addition, they are able to deduce that Scott's relationship with Ramona is on shaky ground, and use this knowledge to demoralize him during their final fight.

In the anime, they don't have many appearances, but in those few appearances, they are shown to be friends with Scott in the future and at the end of the anime, they are seen reading a book on how to redeem yourself.