

In chapter 84 of _Attack on Titan_ ,

> Levi decided to inject Armin with the Titan serum to have transformed the
> almost dead Armin into a Titan so he can consume Bertholdt to gain his
> Colossal Titan's abilities.

Why doesn't Levi just inject both Armin and Erwin with half of the serum each
so both survive?


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2020-04-11T04:44:25.420
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attack-on-titan
Why didn’t Levi inject both Armin and Erwin?


I can't remember if anyone, Levi included, actually saw when he tasted the
serum, did they? And either way, there was one guarantee to get one of them
into action, or a chance to get both, but if it didn't work for any reason,
everyone would get ripped apart or eaten alive. I watched the show, so could
have missed some info from the manga, but sounds like good reasoning to me.


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2020-04-11T14:40:19.730
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A question that we should also think upon: Would Erwin have wanted Levi to
turn him into a mindless Titan just so he could 'live'?

Remember that _the Titan injection turned Armin into a Normal Titan, not a
Titan shifter_. He still needed to eat Bertolt afterwards. If both turned into
Normal Titans, only one would still be able to inherit the Colossal Titan.
_There has been no precedence in the manga nor a mention of an event where two
people inherited the same Titan powers_ but a person [may acquire multiple
Titan shifter abilities](https://attackontitan.fandom.com/wiki/Nine_Titans).

Besides, as seen in **Chapter 84** and to quote from the wiki, Levi himself
did not want to bring back Erwin, even if there was a way:

> Levi notes that Erwin became a demon just as they had wished, and that **he
> deserves to rest, rather than be brought back into their hellish world**.

So, no, only one would still survive.


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2020-04-12T14:54:11.757
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  1. IIRC, Levi didn't know if they needed to have the whole serum injected or just a part, so risking it would potentially kill them both.
  2. Levi knew Erwin wished to die.


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2020-06-13T20:36:30.097
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Only a little bit of the **serum** is needed to transform an Eldian into a
pure titan. To become a titan shifter, however, a pure titan needs to ingest
**the spinal fluid of a person who is already a titan shifter**.

That means that both Erwin and Armin could have survived. All they had to do
was inject both of them with the serum and feed them each half of Bertholdt.
The only problem is the possibility that there is not enough of Bertholdt's
spinal fluid to go around for Erwin and Armin to both transforms into titan
shifters and gain the power of the colossal titan.


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2021-02-21T23:50:38.070
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They only had one titan shifter that is Berthold. Even if Levi injected both
of them, one of them had to be a mindless titan. If they had successfully
captured both Berthold and Reiner, both of them would have been injected.


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