Both Uses

niche
in
Jane Eyre
(Auto-generated)

Mary had a milder and more open countenance than Blanche; softer features too, and a skin some shades fairer (Miss Ingram was dark as a Spaniard) — but Mary was deficient in life: her face lacked expression, her eye lustre; she had nothing to say, and having once taken her seat, remained fixed like a statue in its niche.†
p. 201.4
A peep, and then a long stare; and then a departure from my niche and a straying out into the meadow; and a sudden stop full in front of the great mansion, and a protracted, hardy gaze towards it.†
p. 489.1 *

Definitions:

(1) (niche as in: it is a niche product)
a special role, interest, or small market where someone or something fits especially well; or literally
(2) (niche as in: in a niche of the wall)
a small hollow space in a wall for a statue or decoration; or any shallow recess, cranny, or crevice
(3) (meaning too rare to warrant focus)
More rarely, niche can refer to a role for a species within an ecosystem.