Servitude or something of the sort

[BoxQueen]

I have strange taste in anime/manga that has a character under the command of someone. Like they owe their life to them or they can't live anymore unless they serve that person that revives them. A better explanation I think I could give is that one is useless and relies on the other; the former can do something but only to an extent.

Examples:
Shakugan no Shana
Hayate the Combat Butler
Princess Resurrection
Kuroshitsuji
Zero no Tsukaima

There was more, but I can't remember them on top of my head...

[roriconfan]

3X3 Eyes
Busou Renkin
Fate/Stay Night

[Kotohono]

Uh the all Servants under the 7 masters in Fate/Stay Night should fit I think.

Also it's the Second Season of Mahou Shoujo Lyrical Nanoha; Nanoha A's should fit as well.

[BoxQueen]

Thanks guys, I'll check them out ^^

[kitten320]

I'll give several suggestions, some are not exactly what you are looking for but might pick your interest.

Claymore - one of the characters owes Clare life and she will do all in her power to repay it. Happens in the middle of the series and till the end.

Fate/Stay Night - servants must serve their masters.

Full Metal Panic - not exactly what are you looking for, but the main lead has orders to protect the girl and he will do everything to fullfil it.

Mai HiME/Mai Otome - in HiME each fighter has a child (machine) which follows their orders. In Otome (alternative version) Otomes' have to serve their masters. If one Otome or master dies, the second will die as well.

Phantom: Requiem for the phantom - also not exactly what you want but main hero was brainwashed and now has to follow the organization and work as assasin unless he want to be killed.

Rozen Maiden - story is about dolls who have to dight with each other. In order to be stronger they need to make a pact with Human what means dolls will be using humans lives in exchange for power. Better displayed in season 2 though. But it also might not be what you are looking for.

Soul Eater - 2 types of students: humans and weapons (look like humans but transform into weapons). They work as a team and can't do much without each other.

EDIT: Just changed some misspellings.

[Sackett]

Full Metal Panic (epsecially Fumuffu)

Crest of the Stars very much has this dynamic. One of the best anime around too.

Inuyasha maybe?

[Kafriel]

Katekyo Hitman Reborn comes to mind, although the guardians are not really useless they depend on the family boss, who in turn depends on Reborn.
Hellsing Ultimate - Both Alucard and his little pet.
Beelzebub (coming soon)- A maid servant whose world revolves around a baby, and a deliquent who ends up unwillingly serving the same baby, who happens to be the next king of hell.

[JRendell]

There are some really great manga titles that are exactly what you are looking for too;

Aflame Inferno
Freezing
The Legend of Maian
Mahou Tsukai Kurohime

Freezing will also be getting an anime adaption at some point. I highly recommend these manga/manwha though.

[BoxQueen]

I'll check them out ^^ Thanks everyone.

[qwertyuiopz]

sengoku basara

especially season 2

[Arya]

mmm, I guess Chrno Crusade can fit the requirements.