[quote=@Meta]
<Snipped quote by Stabby>

This isn't about her right now. It's that he thinks that I can kill her, which is stressing him out when it really shouldn't.
[/quote]

Then maybe clearing that up without attacking would help.

[quote=@Techspert]
<Snipped quote by Stabby>

*Shakes my head*
No need, but I [i]do[/i] need Shinji to want the same, for his sake. Right now, Star is the only person who seems to be bothered or willing to hurt him.
[/quote]

Then how about this.
*Looks at both Star and Fairy Blue.*
If neither of you are willing to leave if the other stays, why don't you both agree to leave together and keep an eye on each other.
Of course like you said though, this depends on Shinji being ok with the situation.