In "The Necklace", what is the direct and indirect characterization of Madame Forestier?

Madame Forestier is the old friend of Madame Loisel in
this sharply ironic short story by Maupassant. We are not told much about her but we do
know that she is wealthy and therefore has a stock of jewels that her friend can borrow.
She seems almost to be careless of her wealth. Consider how she lets Madame Loisel
choose what she wants:

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Mme. Forestier went toward a large closet with
mirrored doors, took out a large jewel box, brought it over, opened it, and said to Mme.
Loisel, "Pick something out, my
dear."

She is certainly very
open with her possessions, and gives Madame Loisel free reign of her jewels as she looks
for something for the party.

When they return the (new)
necklace, Madame Forestier is quite sharp with Madame
Loisel:

When
Mme. Loisel took the necklace back, Mme. Forestier said to her frostily, "You should
have brought it back sooner; I might have needed
it."

Although she speaks
sharply here, it is with sympathy that Mme. Forestier addresses Mme. Loisel at the end
of the story and tells her of her mistake:

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Mme. Forestier, quite overcome, clasped her by
the hands. "Oh, my poor Mathilde. But mine was fake. Why, at most it was worth only five
hundred francs!"

Mme.
Forestier therefore is a character who is a friend of Mme. Loisel's who lends her the
jewels, appears slightly put out when she returns them, and then finally embraces her
with sympathy because of the mistake she has made.