Gilbert Kent is Sakuya's illegitimate half brother. After Nagi's grandfather announced a condition in order to inherit the Sanzenin fortune, he quickly begins to pursue the fortune, even begging for it.  (Source: Hayate no Gotoku! Wikia)

Hayate Ayasaki's life wasn't great, but when he loses the job he used to support his good-for-nothing family, and his deadbeat parents sell him to the Yakuza for cash, it really hits rock bottom! Faced with having to pay off the huge debt before he's converted into black market organ parts, a desperate Hayate decides to kidnap oddball heiress Nagi Sanzenin for ransom... but when even that goes wrong and he accidentally ends up rescuing Nagi from other kidnappers, it turns out that Hayate is the bodyguard that Nagi has been looking for! So now he's the Sanzenin family's butler, and… maybe… it might be the start of a potential romantic relationship… assuming Hayate can survive the on-the-job training, of course. 
 
(Source: Sentai Filmworks)

__Height:__ 168cm  
__Weight:__ 64kg  
__Hobbies:__ Reading, Traveling, Singing in the bath  
__Affiliation:__ Kenyu Office. Co. Ltd

__[Twitter](https://twitter.com/naratoru)__

Hardworking Hayate has a plan to pay back the yakuza—who are now the legal owners of his body parts: he’ll kidnap someone and ransom them for a mountain of money! But things get tricky when his would-be kidnappee—who as luck would have it is the daughter of a mind-bogglingly wealthy family—mistakes Hayate’s actions for a confession of love, and subsequently hires him to be her personal servant. At least his employment future is secure, or so he thinks…
 
(Source: Viz Media)

It's never easy to be a gentleman's gentleman, but working for a girl who's not only not a gentleman but also a lightning rod for trouble (and not always particularly ladylike either) is a job that few butlers could handle. For Hayate Ayasaki, however, fighting off teenage heiress Nagi Sanzenin's would-be kidnappers is as much a part of butlering as serving the tea. Nor is that the only dangerous activity that Hayate's bound to be asked to perform during the course of the average day. Need to nurse everyone through an illness? Then that's part of Hayate's job description. Got an embarrassing video that has to be retrieved before it hits the internet or need help returning stolen money? Hayate's your manservant! However, as competent as Hayate may seem, there's one thing he's not particularly good at: noticing when pretty girls are attracted to him. Which is probably a good thing, as otherwise the silverware might never get polished! 
 
(Source: Sentai Filmworks)

Collection of Hata Kenjiro's early works. 
1-5. Umi no Yuusha Lifesavers 
6. <a href="http://myanimelist.net/manga/37413/Hata_Kenjiro_Shoki_Sakuhinshuu:_Hayate_no_Gotoku!_no_Mae/moreinfo">Kamisama ni Rocket Punch!!</a> 
7. Hayate no Gotoku! Special (There is Life in Convenience Stores)