User blog:Otakubookworm/Bleach Narrator/Is Bleach actually in past tense

During the Bleach manga, there is a narrator, he's only appeared twice and said very little, but he's definatly there. First a while back just before they all left for the Soul Society, and the second was definatly Ishida in Hueco Mundo. In both cases he spoke in past tense. So is Bleach narrated by Ishida and is it a memory. Please post and argue.