HANABi / Memorial Address q ~

[Melrose]

Heyos, I have four short questions and I hope someone knows the answer! xP

1 - About who is HANABI (and ep II; which is about the same person, right)? I think her mother, because at AN03 she has a female dancer with HANABI EP II.

2 - Memorial address is about her dad, right? I'm almost 100% sure it is, but still...

3 - What is the male saying in the Memorial address intro?

4 - She has like a ton of "passed away relative" songs; teddy bear, Who..., etc. I'm wondering if there's a song like that that I don't know about. The ones I know are (correct me if I'm wrong please! ):
1 - Who...: grandmother
2 - POWDER SNOW: grandmother (?)
3 - teddy bear: grandmother (?)
4 - Memorial address: father
5 - HANABI I ~ EP II: no clue, mother?
6 - untitled ~for her~: Nanaki (sp, something)
7 - HEAVEN: no clue

Thanks so much!