Ryu has appeared in every game in the series since X-Men vs. Street Fighter.
Ryu wears a white gi and a black belt, and wears a red headband, though, in the other MvC video games, the headband was white.
As a figure who strives to be the ultimate warrior, Ryu's most notable characteristic is that he always thinks about fighting. His motivation inspires characters like Sakura to fight, and is seen by others as an amazing person.
However, he is not without a dark side. His will to fight may cause him to struggle with the Satsui no Hado, a gathering of dark chi that consumes a fighter. The most notable example is Ryu's rival, Akuma, though there have been many (non-canon) instances where Ryu succumbs to the Satsui no Hadou, becoming Evil Ryu.
- Master of a martial arts style with roots as an assassination art known as Ansatsuken. Ryu and fellow disciple Ken uses a sublimated style with the Satsui no Hadou removed from the art. The style appears to be somewhat based on kyokushin karate, as the traditional kyokushinkai techniques can be seen in the character's fighting style. Capcom USA originally referred to Ryu's fighting style as "Shotokan karate", despite bearing little resemblance to the discipline. Because of this, Ryu and other characters who use similar styles (such as Ken and Akuma) are still called "Shoto clones" or "shotos" by fans.
- Most recognized attack is the Ki 'fireball': 'Hadouken'
- Can channel his Ki into powerful attacks once in a while, such as gaining the height from Shouryuuken or spinning during the Tatsumaki Senpuukyaku.
- The Satsui no Hadou (Surge of Murderous Intent), an innate Ki which Ryu possesses, increases his fighting capabilities and the strength of his ki attacks, can teleport and but also turns him into a half demon like Akuma and can also use the "Raging Demon", (the same move that Akuma used to destroy Bison in Street Fighter II) an attack that can destroy the host's Soul if they do not empty their Soul from all negative feelings such as Rage, Hate, Darkness and Desires.
- He's also learned fairly good acrobatic skills to compliment his martial arts.
- Possesses superhuman agility, being able to dodge bullets as if they were nothing.
Cyclops thanks Ryu for fighting alongside him. Ryu leaves him, searching for another opponent to challenge.
After the convergence between Marvel and Capcom universe. He joins a research team accompanying Dr. Bruce Banner to study the anomalies of convergence. Unfortunately, Ryu and Dr. Banner got lost from them and separated each other in Valkanda, Black Panther's domain. Ryu is found by the female Monster Hunter and being taken by her to Panther without any resistance. Sensing Banner nearby as Hulk, Ryu tries to calm his ally's anger, shortly when Captain America and Chun-Li arrived, but being trailed by Ultron Sigma's Ultron Drones to get the Time Stone from Panther. Ryu and Hulk goes fighting the Sigma Virus infected Dah'ren Mohran, with Ryu harnessing some power of the Satsui no Hado, into Mu no Ken to fight it. Once Chun-Li convinced Panther to hand the Time Stone to finish Ultron Sigma to justice quickly, Ryu and Hulk joins Captain America and Chun-Li to return to Avengers Tower at New Metro City.
By the time Jedah and Ultron Sigma's crews began to invade New Metro City, Ryu, Hawkeye and Captain America are seen battling Jedah in Avengers Tower. Unfortunately, Ryu's limit is at peak as the Satsui no Hado began to consume him, which caught Thanos' attention. As Jedah about to weaken Ryu's soul to turned him into Evil Ryu with Soul Stone, Thanos interferes and defeats Jedah, giving a time for Ryu to suppress the dark Hadou.
As the Symbiote monster and the Gravitron Core containing Sigma Virus are destroyed with Time, Mind and Power Stones, but with no effort as the Sigma Virus spread across the Earth, including on infecting the heroes and Thanos progressively. The heroes' only option is to destroy Ultron Sigma, which is their only final battle. As the rest of heroes quickly invades Xgard, Ryu joins Iron Man, Gamora, Frank West, Zero and Thanos to Sigma's Lab to prepare the Infinity Buster for X, utilizing the 4 Infinity Stones they possessed, which survived the convergence, while Dante goes find Jedah to get the Soul Stone alone.
At Sigma's old lab during a process on developing Infinity Buster, Iron Man reveals to Thanos when they fail to stop the virus, the Time Stone shows Iron Man the mystery behind Ultron Sigma's birth, revealing the ploy is actually part of Jedah and Death's plot, using both Ultron, Sigma and Thanos to do their dirty works, which angers Thanos and goes rampaging the heroes out this revelation, yet the Titan keeps his promises for them to finish the Inifnity Buster. Before Thanos gave the heroes back the Time Stone and leave, Thanos had been developing the gauntlet device to absorb Ryu's Satsui no Hado to use it for his revenge against Jedah and Death, freeing Ryu from the cursed Hado.
As Doctor Strange return to get Iron Man's group to the final battle against Ultron Sigma, Iron Man and his group, thought arrived in time are late to watch how Dante tricked Ultron Sigma to use Soul Stone, causing the tyrannical robot turned into a gigantic abomination Ultron Omega for not having noble souls in "them". As X dons his Ultimate Armor, equipped with Infinity Buster, powered by 4 Infinity Stones, Ryu and the other heroes transfers their willpower to X to finish Ultron Omega for good, freeing Earth from Sigma Virus. Despite Ultron Omega's defeat, the Reality Stone is still cracked as a result from a fight between Thanos and Ultron Sigma, leaving the converged Earth remains intact as the heroes began to rebuilt it while waiting for the Reality Stone to be repaired. He tells Spider-Man that rebuilding the converged world as their new home is to honor the death.
Ryu is the quintessential "basic" character in fighting games with an intuitive array of punches and kicks, and very basic special moves, making him the definitive Jack of All Stats character who's meant for beginners and experts alike. In past games, his simplicity gives most beginners confidence in starting most traditional fighters. His speed and health are also often very average, though as of recent titles and later games in the past, Ryu has seen many changes that make him more powerful as time goes on, and less overshadowed.
- Speaking of Evil Ryu, Ryu's text quote upon beating either Phoenix or Wolverine alludes to the struggle with the Satsui no Hadou he went through in both Street Fighter Alpha and Street Fighter IV, "When you lost control, you lost the fight."
- When placed opposite of Spider-Man, Ryu muses, "Spiders. I hate spiders." According to his bio, Ryu hates spiders due to a prank Ken apparently pulled on him in childhood involving having the spider (presumably a tarantula) crawl down his mouth. Spider-Man then tells Ryu off by replying, "You've got a black belt in stupid if you think you're gonna beat me."
- His win-quote against Wolverine references Vega: "And I thought facing someone with one claw was bad enough. You really put me to the test. Thank you."
- One of Ryu's win quotes in X-Men vs. Street Fighter references the original subtitle of Street Fighter II: "You need to learn the way of the World Warrior."
- Another win quote of his references the infamous Shen Long rumor from EGM (and by proxy, his actual win quote from II): "You must defeat my Aerial Rave to stand a chance."
- In both X-Men vs. Street Fighter and Marvel Super Heroes vs. Street Fighter, pairing up Ryu and Ken together allows them to perform a Double Shinkuu Hadouken as their Crossover Combination. This is a likely homage to the finale of Street Fighter II: The Animated Movie, where the two combined their Hadoukens as a finishing move to defeat Bison.
- In the ending cutscene of Marvel vs. Capcom 2: New Age of Heroes, after you defeat Abyss, you can see Cyclops and Ryu shaking hands. This can be a call back to the title screen of X-Men vs Street Fighter, where both of them are shaking hands behind the game's logo.
- It's assumed that Ryu's rival is currently Wolverine. Both are fierce veterans in the game series, often being many fans' #1 character picks, and both are portrayed as warriors with an honor code, a murderous side, and the will and determination to fight against all odds. Both have also spent time living and training in Japan, for many years at a time. Furthermore, they are both iconic characters for their respective franchises, both specific (X-Men and Street Fighter) and general (Marvel and Capcom), so the pair seems ultimately justifiable.
- Before the rival switches, he was originally paired with Cyclops (who got excluded from Marvel vs. Capcom 3). The reason is that both could be considered the "Leaders or Heroes" of their franchise (since the first Capcom VS Game was originally X-Men VS Street Fighter).
- He was one of the first six characters to be included in Marvel vs. Capcom 3.
- Ryu's ending features him about to fight Iron Fist in a dueling arena. Also in this ending if you look behind Iron Fist on the second picture there is a board which says "Up Next: Ken vs. Mr X".
- Ryu's after-match quote to Deadpool makes a reference to Deadpool's Shoryuken, shown in a comic book (where he used it against Kitty Pride), and also one of the moves Deadpool can use in Marvel vs. Capcom 3.
- Ryu was one of the first to gain a Downloadable Costume which became available March 1st.