Are the Aliens a threat to Earth?

This question been bugging me, I mean are they trying to take over Earth. I mean, I remember the green onion alien with it father and son, they just trying to survive. The aliens didn't do anything that suggested invasion they like illegal Immigrant coming over to america to survive not invade. I mean if they were here before Kei was a gantz hunter then why didn't they try to overtake Earth yet.

Are they a threat? If so Why?

the mission of gantz is juz to remove any 'out of the world' species regardless if they're good or bad.

...some yes..some no.
Do you remember the chapter 21and something..when The Oni Alien said that he will kill all the human race...and take the earth.
i think that the aliens that the gantzers must kill, are surviviors...and they want to reproduce and take the control of earth...
or only want to live in peace....or something like that.
We should wait..and see the last chapters...or ask...the members that have other oppinions..(i recommend this members): Tetnubis, Coolerimmortal, Jota...Lou Zi Faah(i can't remember the last time that i see him)....

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There are still too much mysteries in manga to answer this question.
Maybe aliens don't exist and Gantz just creates them for fun?
Answering your question - not all of them. Oni alien was going to kill everyone on the Earth(as long as i remember), while the others were just trying to survive. No, there are no aliens enough to overtake Earth. IMHO.

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It's self-defence, there's no problem with that!
Katsuya Suou, Persona 2 Eternal Punishment

The possibilities are many, but personally i think that they all just want to live their lives, the oni mission suggested a possible takeover involving the vampires and the oni aliens, seeing as the oni aliens and bosses were gang members, and as we know the vampires are like the Yakuza.
But if we look at the previous missions excluding the demon horsemen mission (before Tae) none of the monsters were a threat at the time, untill they were provoked by the Gantzers.

Previously, in the first chapter about Akira, the vampire spokesman (supposed vampire) spoke of the Gantzers as "Vampire hunters". Now with this its possible that Gantz wants to elliminate any possible future threat seeing as the aliens could be recruited, to make the vampires "army" stronger. And it also steers towards them being the final target.

But with the new infomation about there being more than one Gantz, and the fact that i dont like them, i find it hard to believe that the vampires are the final target, and that all the aliens are just trying to live their normal lives.

I have more speculations, but im not up for typing that now.

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I think the same way.

The little onion alien remind me bolivian people in my country, I mean, the way they're treated.

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i think the aliens might have been created by gantz to train our gantzers into vampire killing machines well that is what i think.


im so hurt nishi i wasnt in the list

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...well that is sad Jota...our country is sad.
But you specifed the Onion alien....and what happend with the Oni?...or the Dyno?..they don't look like the bolivians in our country.
Hey Adriangt...sorry if you weren't included in my list..i also forgot Dennise, Dekkai, Nishi tetsu, Seal Broken, Nothing Special, Kei Kun...@_@ but if i put the complete list...it would be endeless @_@

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thanx you would be on my list

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Yeah, I'm in favor with the gantz training to kill vampire method. Afterall it seems that vampires are trying to find gantz/grantz players to kill.