It' s difficult to remember all the main characters' names & relationships, so I made ...

It' s difficult to remember all the main characters' names & relationships, so I made a quick reminder, and thought it could be useful to someone else, so just in case:
Beware of SPOILERS:

[Yukio, Tetsu, Hyodo]'s story ch.1-17
[Heiji & Matsatugu]'s story ch.18-28 33-34.5
[Hisako & Hidetsugu]'s story ch.29-32

• YUKIO
best friend ➺ TETSUSHI
father ➺ Sanada RYUUJI
mother ➺ TSUBAKI (raped & killed by ASHIEI)
brother ➺ JUN (father ASHIEI, who worked for WANG)
half-uncle ➺ REIJI
taken by WANG from HEILONG/'Snakes' clan

• TETSUSHI
in love w/ YUKIO
brother-in-law ➺ RYOJI
sister ➺ RIKO

• Sanada RYUUJI (tatoo artist, killed by the HEILONG clan)
wife ➺ TSUBAKI
son ➺ YUKIO
friends w/ ➺ HYODO & MATSATSUGU
half brother ➺ REIJI
father ➺ Sanada MASAHISA (killed by HIDETSUGU)

SEIDOUKAI clan
• Kazutaka HYODO/KYOUDOU
right-arm man of HIDETSUGU
sworn-brother & long-time friend ➺ MATSATSUGU
underlings ➺ HANDA & ODAJIMA-san
adopted siblings ➺ HEIJI & HISAKO

• Doumoto MATSATSUGU (next head)
visited CHANG from HEILONG clan days before the bombing
father ➺ Doumoto HIDETSUGU
lover ➺ REIJI

• Doumoto HIDETSUGU (current head)
ex-head of the KAWAGUCHI clan
killed Sanada MASAHISA (head of the KAWAGUCHI clan)
then adopted Sanada REIJI & HISAKO
wife ➺ FUSA

HEBI clan
• Sanada Nakamoto REIJI (Snakes' boss)
visited WANG from HEILONG clan
killed CHANG from HEILONG clan
adoptive son & victim of ➺ HIDETSUGU
lover ➺ MATSATSUGU
sister ➺ Sanada HISAKO ('lover' of HIDETSUGU)
half-brother ➺ RYUUJI
mother ➺ SUMIKO
father ➺ Sanada MASAHISA (head of the KAWAGUCHI clan, killed by HIDETSUGU)