[x]Brother Figure/ Good Friend : Reno
[x]Silent Admirer: Rude
[x]The Idol/ Admired: Rufus
[x]Love Interest: Tseng
After the incident in Sector 7, it is widely known that Reno got hurt. Elena had to replace him on field work. Logically speaking, I don't think Reno would give his job over someone he doesn't trust. More importantly, if Elena was given the slot to replace Reno, I think Reno himself recommended Elena for the job. Point discussed, it is safe to conclude that Reno actually trusts Elena.
In the game, you'll bump into the Turks here. First you'll find Reno and Rude talking about who they liked. Apparently Rude answers Tifa, but has anyone ever took note that Reno never answered his own question? There are two possibilities for this. One is that the person he likes is close by and he's trying to hint at that person; Two is that he's trying to catch someone's attention.
Of course Elena gets miffed by the fact that they're always talking about who they liked and launched into her "Tseng's different" dialogue. I would like to take note that she seems to be rather defensive here. She was angry and walked away before Reno could even speak. An indication that she might like Reno, even just a bit. Although that "Tseng's different" dialogue may seem misleading, it sounds as if she's always praising him like a fan would an idol. This here confirms how much Elena idolizes Tseng.
Now, this is the part where you can see the more sophisticated and serious side of Reno. What brings it to action? Elena kidnapped. Well, yes. That's quite obvious. He was, unlike the rest of the parts of the game, serious. I don't think I should expound. His seriousness speaks for itself.
You might want to ask: But Tseng said, "Let's have dinner after this" to Elena when he asked her to leave without him to tell HQ back in ToA!! My defense to this is the fact that Tseng, as much as I know about him, is quite genial. Besides, he didn't want to worry the girl. Talking of dinner and dates doesn't really mean that they're together in a romantic manner. To my knowledge, Tseng is like the resident older brother among the four of them which will clearly explain the fact that Elena looks up to him. Again, hero worship and not love.
How about the Icicle Inn incident when Elena gets hell pissed? Let's look at it this way, if someone you cared about and considered important to you gets beaten and arrives in critical condition after assuring you he'd be all right what would be your initial reaction? Instinctively we are driven by our emotions to irrationally retrieve and process information in such a manner that would be similar to a slot machine. We lash out our anger at the odd slot that won't give us our jackpot prize. That would be Cloud to Elena. Because she was hell worried and she was looking forward to be reunited with Tseng and be with her Turk family again. Elena, you see, is like a little girl who's trying to keep her family intact. She's full of ideals and so she acted that way she did.
Filter: this is where you place whether it's NC 17 or not and where you specify anything that might potentialy disturb people.