My Thread of Neverending Questions

So instead of making a new thread every time a question arises, I'll just use this on from now on.

First, I've been seeing some verbs that look like they're in command form but that wouldn't make sense within the sentence's context, like this example:
ああ あなたがたは 光の戦士達…… 助けて下さって ありがとう！！
I know it translated into something like "Ahh, you're the light warriors... Thank you for saving me!!" but why is 助けて下さって in て form?

Another question is I'm seeing lots of verbs end in てくれ. Is this meaning something like "come and do the verb?" Like in this sentence, would it translate as come and save her?
光の戦士達……予言者 ルカーンの 言った通りだ。私の 頼みを聞いたくれ。
王女が ガーランドに 拐われたのだ…… 頼む 助け出してくれ！

Finally, can 事 refer to someone's state of being? Like in this sentence:
セーラは いつも そなた達の事を 気に掛けている。

Big thanks for any help.

Best not to think of the て form as a command. It only has that meaning when it is not followed by anything else, and even then not all of the time. The てform is one verb ending verb that can be followed by many different words to create different 'grammatical' structures. It is like the るform, ます form, おう form, etc in that way.

To thank someone for doing something, you put a verb in the te form then add a thank you word. To thank someone for doing something for you, put くれる、くださる、いただく、etc in the te form, then add a thank you word.

てくれる and てくださる are very similar, the main difference being the latter elevates the person you are speaking to. Both are verb ending that are used when someone else does something for you.

～てありがとう
～てくれてありがとう
～てくださってありがとう all mean thank you for doing ~ (for me).

~てくれ！ Is an informal request (for someone to do something for you). Here it means Please save her! (please get her out of there!)

彼のこと 私のこと 彼女のこと etc all basically mean the same thing as if you did not add のこと。

Very helpful reply, thank you my good man

I've been seeing verbs quite often end with "ん" (like 来るん in the sentence below), and was wondering what exactly this means? I'm assuming it's just a way to say the words easier, but I want to make sure.
あんたは、いつもこういう時に来るんだから、困るんだよ。

It's a contraction of の, and the form is actually "verb の だ/です", and it often implies a sense of explanation or similar emphasis.