Folks there seem to think that this is a toxic Solanum pseudocapsicum (Jerusalem Cherry).
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In related news, you could let your friend know that all peppers are Perennial, if he wishes
to grow an actual pepper that is both ornamental and edible. I have four peppers in the house
for the winter. The dwarf varieties - like various Thai chilis - are nice and compact, and have
smaller leaves.

Josh

Thanks, Josh. Are you keeping your peppers as ornamental house plants, or are you shaping them into bonsai too? I am new to this, but it seems like there are many things that one can try.