Well, anybody can recommend you a vibe, dear, but no one will be able to know for sure what works for your friend. Everyone has a different body, and while there are definitely certain aspects that most of us bend to, her needs may vary drastically. If she is comfortable telling you, perhaps posting what she may like to look for in a vibe would be the best information for us to go by.
If not, I think you should go for something with no frills, basic, and fairly cheap, but still has a nice variety of functions for her to play with. I'm not even going to say "inexpensive" here. While one can argue that you get what you pay for, it's much worse to pay for a more expensive vibe and find out it doesn't work for you.
If this is her first, she should keep it simple, use a common safe material, like plastic, and make her own assessment of her needs based off of that. Plastic is a great starting point for both insertion and clitoral stimulation because it's firm for g-spot play, transmits vibes well in both areas, and inexpensive. She can really get a feel if she needs something more flexible and softer or something harder and rigid after using plastic.
That being said, I recommend Cupid's Love Wand: link
It's slim, quiet, no frills, and made of plastic, and functional. It does have a light seam, but it appears to not be too noticeable. Cupid also has a variety of functions that are easily controlled by the click of a button so it's simple, but she has a lot of room to experiment on her clit and insertion wise and will really get an idea of what she could want later, or she could be satisfied with this~. It's also a fair lavender with a cute cord with a heart on it, just in case~. I can't say that is intimidating at all.
And a fair price on top of it and a great bang for your buck.
That being said, I still don't know what her specific needs are. It's possible she can handle more girth than a slim vibe, or she could be like me and wasn't able to handle even an inch for awhile, so, I'm not sure how experienced she is with insertion, but I wanted her to get a variety of opportunities with her first vibe, so, I didn't pick a bullet or pocket rocket which is mainly for the clit. I hope this helps.