In most closing credits sequences of Danganronpa, a picture of some characters in a classroom appears.
These pictures always feature Naegi, along with the characters that die along the show.

End card from episode 2, featuring Naegi, Maizono and Enoshima http://i.imgur.com/KkTgzk2m.png End card from episode 4, featuring Naegi, Maizono, Enoshima, Fujisaki and Kuwata http://i.imgur.com/TQGoy7dm.png
End card from episode 6, featuring Naegi, Enoshima, Fujisaki, Kuwata, Oowada, Yamada and Ishimaru http://i.imgur.com/oh29ENtm.png End card from episode 8, featuring Naegi, Maizono, Enoshima, Fujisaki, Kuwata, Oowada, Yamada, Ishimaru, Celestia and Oogami http://i.imgur.com/Ek6cv1tm.jpg
End card from episode 10, featuring all 15 students http://i.imgur.com/xf08qAqm.png
^{Closing credits for episodes 2, 4, 6, 8 and 10 (left to right, top to bottom)}

Except for the last one, which shows all 15 students, these feature the characters that died either on that episode or on the previous one (which had no ending sequence). However, Naegi seems to always be featured in these photos.

Is there any particular reason for this? Or is it simply because he is the main character?

In most closing credits sequences of Danganronpa, a picture of some characters in a classroom appears.
These pictures always feature Naegi, along with the characters that die along the show.

^{Closing credits for episodes 2, 4, 6, 8 and 10 (left to right, top to bottom)}

Except for the last one, which shows all 15 students, these feature the characters that died either on that episode or on the previous one (which had no ending sequence). However, Naegi seems to always be featured in these photos.

Is there any particular reason for this? Or is it simply because he is the main character?