

Your real duties, though, lie before and after the whole wedding affair. "Yes, hi, hope you're enjoying the food!"

South Indian weddings generally have a meal thing where the ones closest to the bride and the groom are supposed to go to each person and make courteous small talk. I am assuming that this family will have the sense to put more people on this job, rather than just letting you deal with it solo. When people give gifts to the couple, you will be responsible for stowing it away. Maybe you'd be expected to introduce yourself and inform them that she's on her way. She's also expected to step in for the bride when there's a giant influx of people which makes it impossible for the bride to personally greet everyone all of a sudden.

SOUTH INDIAN WEDDING PALLAKI PLUS
It's not easy for me to ask my friend what she expects for a variety of reasons (she's too shy/introverted to say I'm too awkward to properly ask despite us being very good friends we are not good at talking about this stuff we currently live far away from one another so no face-to-face possible which makes all this much more difficult, plus I feel like I should already know this shit because I am a person of Indian origin but I fucking don't and am too embarrassed to admit this directly). Haha, yeah, it's not an official title, that's why I put it in quotes, which is exactly how the bride said it to me.
