In order to use the Esuna's Website, you need to have an active Guildwork account.

To register on Guildwork :
http://guildwork.com/

Tutorial here :
http://final-venture.guildwork.com/forum/t/4d57c9d7205cb239ca003d39-final-venture-faqs-amp-tutorials?page=1#4d57c9fb205cb239ca003d43

Once you have an account, there is 2 possibilities to be a member of Esuna's website :

1/Link your Character on Guildwork
If you choose to link your Character on guildwork, you will be immediately associated with all your linkshells that are present on guildwork. To bind your character, please follow this tutorial :

http://final-venture.guildwork.com/forum/t/4d57c9d7205cb239ca003d39-final-venture-faqs-amp-tutorials?page=1#4d57ca1f205cb239ca003d4f

IMPORTANT
If you had an account and a linked Character BEFORE the merge, you need to Edit your Character and change your server in order to update your linkshell status.

2/Get someone to invite you on the website
Once you are registered, you can tell me your Username. I will then invite you on Esuna's website and you will be a full memeber after accepting.