Freshwater Pufferfish?

The usual puffer for freshwater is the dwarf puffer, Cariontetraodon travancoricus. These fish should be kept alone as they don't play nicely with other puffers or with different species of fish. The word I've seen used to describe them is vicious.
They are not the easiest of fish to keep as they won't eat flakes or pellets and need to be fed live, or frozen live, food.
They need a heavily planted tank to do well, and lots of things for them to swim through as they are active, intelligent fish.
Feeding snails is the best way to keep their beaks trimmed, though finding a continuous supply of snails can be a problem.


To be honest, from everything I've read, puffers are not the ideal beginners fish. Your friend may love them but I would think twice about getting her one.