Raven.

Starfire offers to share her understanding of English with you. While it is more difficult, it IS possible for a Tamaranean to share foreign languages with eachother. The process is not as simple, but it is possible.

When she explains most of the key differences to the other Titans, you begin to understand just how different their culture is compared to yours.

Cyborg's nose begins to bleed, Beast Boy outright passes out, Robin looks like he wants to tear you apart with his bare hands, and Raven looks off to the side, though you can tell that her face is flushed red.

Without the understanding of their language, you are unable to make out what Robin says, but his body language makes it clear he does not approve. Starfire, perhaps one of the gentlest souls you've ever met, was equally mad and yelled back. A few choice words from your home planet were enough to reason that this was not an argument your wanted to be apart of.

To this day, neither one of them are willing to tell you exactly what was said. And the other Titans aren't talking for one reason. Cyborg "doesn't want to be involved in THAT mess", Beast Boy is terrified that one, or both, of them would brutally mutilate him in response, and Raven just tells you not to worry about it before going back to whatever she was doing.

So after about half an hour or so, eventually Starfire tells you that you must kiss Raven. The girl in question doesn't exactly look happy with the matter, but she doesn't fight it nearly as much as you'd have been led to believe if she truly detested it.

You admit to some impatience on your part. You simply wanted to be able to effectively communicate with the group of superheroes and then figure out what you could/should do next.

You gently place your hands on Raven's shoulders, causing her to shiver slightly from your lowered temperature. There's enough of a height difference that you need to lean forward some so that your lips can make contact with hers, and only if she lifts her head up as well.