Walker Yumasaki

Walker Yumasaki (遊 馬崎 ウォーカー, Yūmasaki Wōkā), like his female friend and companion, Erika, is a very passionate otaku and manga reader, although he doesn't share the same love for yaoi that Erika does. He and Erika are nearly always together. He also likes to perform torture by letting the victim to choose a light novel or manga, and carrying out the contents. He seems to be carefree and is usually seen wearing a wide dumb smile, but in reality he's a serious thinker. Like Erika he is very mysterious person. He is a member of the anonymous online gang Dollars and is also a member of Kadota's gang. In the later episodes, Walker was asked to remain inside thevan for the invasion of the Yellow Scarves, because he would "stand out too much". He can also be seen with Erika in the hospital in the last episode, with her head lying on his shoulder.

Anime
Anime specific spoilers about this character per episode.

Episode 01: Masaomi introduces Walker to Mikado.

Episode 03: Mikado and Masaomi then run into Kyohei Kadota, Erika Karisawa, and Walker. They tell Mikado to stay away from the Dollars, then Walker and Erika try to decide whether the Dollars are at war with Flame Haze, and whether Kyohei is an older brother character or the father character.

Episode 05: Walker and his friends are discussing the same gang war in Russia Sushi resturant. Then Masaomi enters the restraunt and asks t him and Kyohei for advice on how to keep a friend of his from the Dollars.

Episode 06: At first Walker was chasing some kidnappers in Saburo's car. Then it goes back further to the day where Walker, erika, and Saburo go to an room where Kyohei was titling a wall. Then when Kyohei gets an message from Kazutano that he broke a plate Walker thought he faked it.Later the crew go to Kazutano's place to deliver him sushi. But Kazutano's place was an wreak and Walker thought he mean't to say he broke an bowl, which obilosly wasn't the andswer. So when Hashim appears Walker thinks he the little brother charater.Hashim gives them the kidnappers plate number and they drive off. Then Walker tried listening to Kyohei when he called Kazutano's cellphone, but he heard Izaya Orihara on the other end who gave where the passed out kidnapper was. Kadota's crew finds the kidnapper and tries to wake him up (Erika and Walker offer to torture him) to no avail. Then Walker party's when they find where the kidnappers were. Then the whole episode when the chased the kidnapper's car happens again. In the end Walker and Erika manga tortures the fat kidnapper, and went to Russia Sushi to celebrate.

Episode 08: Walker bursts into a cafe, searching for his missing phone. Two waitresses greet him as he enters. Later he asks Simon where Erika was and Simon dosen't know. In the end of the episode Walker dances with Erika once he did find his phone.

Episode 10: Walker was in Saburo's car when Saburo chased some people who threw a pebble at his van.

Episode 11: He got the call for the "Dollars" Meeting. Earlier, Kyohei's gang ran a red light and almost hit the redheaded girl. They talked with her, but she said nothing. Walker posted on the Dollars website that they had found a girl with a scar on her neck and received a request from the admin (Mikado) asking for details. Episode 12:  Walker and Erikawonder if they hallucinated the whole meeting.

Episode 12.5: He narrates. At first he was with Kyohei,Erika, and Saburo. Saburo was looking at his scratched car. When Saburo was looking he saw some flying bright stuff going scross the sky, and he thinks it's aliens. It goes earlier of the day when he was doing a suitra to attrack aliens to get the red bag from their roof. But a black comes next to them, and the person in the passengers seat starts shooting at them, and he thinks its the MIB. During the chase Walker gets mad that the things from his novel is being played right before him. The chase causes the red bag to go off the roof of the car. Then Saburo was pulled over by Kinnosuke Konmura. Then it goes back earlierinto the day when he was in Saburo's car. Then a man flew across the sy and his red bag landed on the ground. so they get out of the car and looked at it. Then when Kyohei went to open it Walker yelled at him thinking it was an bomb, but it wasn't an bomb. Then it goes back to where they saw the flying people in the beguinning.

Manga
Manga specific spoilers about this character per volume/chapter.

Durarara!!
Volume 01: He and Erika was in the manga shop. And they did say to Mikado and Masaomi they bought 40 books for themselves and for other reasons...

Volume 02: Walker goes in Saburo's van with Erika when Saburo allowed them to do mange torture to a Yagiri Pharmacueicals worker. The worker had to choose an manga for is torture. Walker then agreed with Erika when she suggested Darker Than Black. When Saburo says no gasoline Walker gets sad. Then finally the worker picked Black Butler. So he tries using an shoulder gun on his eye. But Kyohei stops him from doing that. It turns out that Walker's entusatic caused Kyohei to join the Dollars.

Volume 04: He gets the "Dollars" meeting text. And shows it to Mika. Later helps brings Mika to Celty. In the end he sees Celty drive by. And was stated to be in the everyday life category by Celty.

Duararara!! Saika
Volume 02 Saika: He is on the cover.

Light Novel
Light Novel specific spoilers about this character per volume/chapter.

Volume 01:

Volume 04 : Mikado and Anri ask Erika and Walker for tips on how to show someone around Ikebukuro. The two of them try to come up with useful tips and a list of some of the more interesting spots in Ikebukuro but decide to just accompany them directly. After they part ways, Erika and Walker are walking with Kyohei when the spot Mairu and Kururi being harrassed. After Kyohei chases off Toromaru and calls in Togusa to pick them up, the Toromaru members return in force and chase the six of them across the city. They pick up Anri, Mikado, and Aoba along the way as well as join up with Celty who is also being chased. Walker and the others get dropped off near a police station but he and Erika go back to help with Toromaru only to see the situation being taken care off by Ruri and Igor. Later, he attends the Hotpot party with everyone else.

Volume 05 & 06 : Walker goes into a gift shop to buy a painting but immediately recognizes it as a copy and calls out the manager on selling a fake at such a steep price. the scene also attracts the attention of Chikage found out about Walker's status as a Dollars member from one of the thugs that he had taken hostage. After Walker leaves the store in a huff, Chikage starts tailing him all the way to where he is meeting Kyohei and the others. Kyohei notices Chikage and eventually separates from his friends. Eventually, after Chikage and Kyohei are cornered by the rogue Dollars members, Walker, Erika, and Saburo arrive with reinforcements. When the kidnappers were distracted by Vorona's flashbang, Walker swooped in and chased off the guy who had a knife to Non's throat. With their bonds cut, the girls flocked behind Walker who held a makeshift flamethrower (a spray can and a lit match) in his hand that he used to keep the kidnappers at bay. Walker and Erika spent most of the fight protecting the girls until Anri and Vorona entered the fray where Walker and Erika witness Anri and Saika in action. After the fighting has died down and Anri leaves, Walker and the rest of the Van crew turn to leave. After Erika makes her newest pair (Chikage and Kyohei) apparent to the group, Walker expresses his annoyance at how fujoshis (yaoi fans) seem to pair up just about every male character they see regardless of things like age or how they relate to each other.

Volume 09 : Walker is next seen hanging out with Kyohei and Saburo at Russia sushi, expressing a sense of lonliness without Erika around (since she's the only other person that he can talk to about manga). He also witnesses Masaomi's return to Ikebukuro.

Volume 10 :  After following Togusa to apologize to Togusa's juniors (not from Raira) for the inevitable damage to the school's reputation when he uses his van to drag someone to death, Walker heads to the karaoke lounge, the revived Yellow Scarve's meeting place, to ask if they were the culprits behind Kadota's attack. Kida denies it. Walker then says he does not suspect Kida, knowing him relatively well, but questions the innocence of the other gang members. Kida guarantees that they were not responsible, and agrees to let Walker do as he pleases if he finds that a member was involved. Walker apologizes and leaves.

When asked why he didn't go on the offense, Masaomi whacks his friend's head, pointing out the heavy smell of kerosene in the room.

Walker doubles back to tell them of the Dollars rumour that Heiwajima Shizuo has been arrested.

On the way home, Walker notices someone following him. This turns out to be Izumii Ran with a long-handled hammer. Izumii attacks Walker and has Walker on the ground, and almost beats him up. Walker tries to set him on fire. Izumii ends up unwounded, but gets a call (most likely from Dragon Zombie), upon which he replies very uncharacteristically polite. Izumii lets Walker off on this count, and reveals that he plans on going after Kadota as well. Walker concludes that Izumii was not the culprit, as he wouldn't have just left Kadota alive and his body intact.

Volume 11: He does join Shinra's information group.

Trivia

 * His given name "Walker" is the most unusual for a Japanese name as it is written in katakana. He is bi-racial.
 * He works as a freelancing ice sculptor.
 * Ironically, whenever Walker gets into a fight, his most preferred methods usually involve using fire in some way (molotovs, a lighter and spray paint, etc.) heavily implying that he's a pyromaniac.
 * He gets sad when Erika not around. Because she's the only friend of his that reads manga. (As of the anime.)