This character speaks in emojis. Your interpretation is as good as mine.

Voice style: Crazy.

Moods: Crazy in various forms.

Ideals:  While a bit of a coward, he's gone completely insane from his time in isolated prison. He doesn't really have goals or morals to follow.

For more info, check the wiki below.

http://tokyoghoul.wikia.com/wiki/Shikorae