I've seen this a few times lately and I wanted to make sure I get it. Most
recently I saw it on a video with an animal's thoughts narrated. It said
この人間がいると安心できない。I take this as meaning "When this human is here I can't feel
relieved/I can't feel relieved if this human is around". So, ～がいると means
something to the effect of "when x exists/if x exists"? Would this be the most
common way to talk about "you" and specific people being around as well? Such
as 君がいると and さくらがいると?
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2022-08-05T15:38:14.217
95707
2023-06-06T06:04:10.450
2023-05-07T05:46:05.613
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question
translation particle-と conditionals
がいると? Condtional to express "When x is around"
Your question contains more than a couple of grammar peculiarities. The
meaning is "I feel insecure whenever this person is around.",  
BUT,  
"この人間” (this person) is someone close to the speaker at that time, so that
your phrase is mostly supposed to be uttered by someone in a group, while
someone in the group is speaking or doing something.  
It is a phrase that could be uttered by a girl who feels somewhat assaulted by
somebody.
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2022-08-07T19:26:35.887
95733
2022-08-07T19:26:35.887
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answer
If I understood the question correctly:

Yes, (I don't know if most common, but) at least I think it does sound pretty
natural if someone says e.g.: 君が[e.g.近くに]いると安心できない

As to the この人, at least I'd say that you esp. in the contexts as above, can
also use it to refer to yourself, like in;

[分かってるよ、]この人がいると安心出来ない[っすよね。]
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2023-05-05T15:47:04.367
99529
2023-05-05T15:47:04.367
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answer