- "Medic Union! Here's a shot, straight from the heart!"
- — Medic Union Motto —
Medic Union (医療連盟癒し隊) is a special support guild in The World R:2, founded by Seisaku and Hideyo. Styling themselves as a sentai force, each member picks a color upon joining as a new name. Most of the members have identical character models, favoring a Tu Tribe Harvest Cleric, though there are exceptions. All members are required to end their sentences with "~nyan!" in the Japanese version, and "meow" in the American version. The guild's mission is to roam the fields and dungeons of The World, giving support to all who need it. Aside from the one member running their Guild Shop, members of this guild can usually only be encountered in areas ("in action"). The Medic Union doesn't believe in the need for a guildmaster, several members hold leadership titles. The technical guildmaster behind the guild within The World's system is unknown.
The guild is based on the disbanded guild named Paw Pad Squadron that Seisaku and Hideyo were both members of. The old guild was similar to Medic Union in function, but fell apart due to conflicts between the Guildmaster Tabby and the other members. Not willing to follow Tabby's goals, Seisaku and Hideyo left the Guild and formed the Medic Union to achieve the goal that the Paw Pad Squadron had failed to reach.
- Heal Red - Seisaku
- Heal Blue - Hideyo
- Heal Black - BJ
- Heal Thunder - Osamu
- Heal Salmon - Guts
- Governor Tadashi
- In Japanese, the full name of this guild is Medic Union Healing Squad, but it was shortened for the American release.
- Though Tu Tribes do favor the use of magic, The Tu Tribe requirement for membership may be a tribute to the character Phyllo, who Seisaku and Hideyo were close to when they formed the guild.
- The guild was started in .hack//Roots by Tabby, Seisaku, and Hideyo.
- In the English dub of .hack//Roots, the guilds name was mistakenly announced as the Medic Troop.