What anime is this grey-haired character from? Does anyone know which anime this character is from?
The name of this anime is Yosuga no Sora:


Yosuga no Sora (ヨスガノソラ?, lit. Sky of Connection) is a Japanese
romance/drama adult visual novel developed by CUFFS (&quot;Sphere&quot;). The
game was originally released for Windows PC on December 5, 2008. It
was adapted into a serialized manga and an anime TV series. A
sequel/fan disk titled Haruka na Sora was released later on October
24, 2009, which contains new and expanded scenarios for several
characters from the original game.

Plot

Haruka Kasugano and his twin sister Sora have lost both their parents
in an accident, and with them all their support. They decide to move
out of the city to the rural town where they once spent summers with
their late grandfather. At first everything seems familiar and
peaceful, but changes come as Haruka starts to remember things from
his youth.

Read more here.
The guy in the image is Haruka Kasugano:

This image is larger comparing to the one you post in you question:

Their hair look the same in both pictures, so I think this is the anime you are looking for.