Jenos Hazard in the manga
Jenos is 25 as said in the anime.Jenos is the Chronos Numbers member Number VII. Among the Chronos Numbers, he probably is the best looking, and is a bit of a womanizer. However, he does not just flirt with girls, as he actually falls in deep love with every single one of them, Rinslet Walker being one of his favorite candidates through the story. Jenos's weapon is a glove named "Excelion," which has indestructible Orichalcum wires attached to it, and can be used to cut very deeply or grasp something very tightly. Along with Naizer and Beluga, he is a member of Cerberus, being the middle-range attacker. He stops Beluga from executing Nizer's suicide plan to finish Creed off, resulting in a risky escape from the castle where Beluga dies to hold a huge ceiling tile while Jenos escapes carrying Nizer unconscious. He also plays the role of trying to stop Baldorias and Kranz from fighting Train and Sven (even though he's not very warmly received), and brings Kyoko to Sephiria for their meeting, where Sephiria wishes to test Kyoko. In the final attack on Clarken Island, he tags up with Lin, who he shows great ease in getting along with.

Jenos Hazard in the anime
Even though on the Manga he shows a friendly alignment to Train and Sven's sweeper team, in the anime, he shows a neutral attitude at the start, mainly because Eve was his target once, saved by Train. However, he develops a supporting attitude towards Train's group as of the Eden incursion. He also has a different role, as he partakes in many missions he did not in the manga. For example, he watches the World Conference in a helicopter and is also given the mission of taking out Eve or take her to the Chronos headquarters at the start. In the Anime, he also is always accompanied by a Chronos eraser, that aids him. His relation with Lin is not of old acquaintances, as it is more strict and formal. Also, it would seem his feelings towards Rinslet are of love, even though it's not known if he's just a flirt.He always finds opportunity to express his feelings to Rinslet at tight situations even though they are just words. However, they are closer than they are in the Manga. In the last episode, Rinslet is talking on the phone with him.

Incidentally, it's worth noting that Jenos' number is 'Lucky 7' the opposite to Train's 'Unlucky 13'. As such, his 'VII' mark is also on his chest, but on the opposite side from Train's. But overall, Jenos was never said to be lucky even if he was the "lucky VII."

(Source: Wikipedia)