Gemma Knights The Gemma Knights , also called Knights of Gemma , is an organization in " Final Fantasy Adventure " . The Gemma Knights protect the Tree of Mana and the members of the Mana family . Story . The Emperor of Vandole once used the power of Mana for evil purposes , but Vandole ' s evil purpose were stopped by the Knights of Gemma who guarded the Tree of Mana . The Gemma Knights joined hands with the Mana family , the keepers of the Tree of Mana , to fight a long hard battle . Finally , they were able to restore peace to the world . In the modern day , a Gemma Knight by the name of Hasim who works for Bogard is escorting Fuji . However , he is fatally wounded from trying to protect her from monsters , though before he dies . He ask Sumo to bring the girl to see Bogard . After meeting him , he mentions that Fuji is the key to win this time against Glaive Empire . After Fuji ' s kidnap in Wendel and brought inside the airship , it flies to the west . Sumo goes after her , and after coming out of Gaia Pass . Borgard catches up with him and tells him that Glaive ' s Airship is refueling at a lake up north . They both board the airship and locates Fuji within it , but end up being thrown off the airship and both of them ends up separated . Sumo later ends up in Ish , wakes up next to Borgard who ' s bedridden since his back is broken and won ' t be able to move for a while . He is distressed to hear other places are being attacked , but kept saying there is a boy named Sumo who will come and save everyone . Sumo loses his confidence with himself , claiming he is not a Gemma Knight . Bogard tries to talk some sense to him , but Sumo does not let him . He tells Bogard that he is a Gemma Knight , and he should do it . Bogard angrily tells Sumo to get out of the house , which Sumo does . Sumo revisits him before leaving town , and Bogard warns him it ' ll be a perilous journey . Julius got the power of Mana , and the only match against it is a knight wielding the legendary sword Excalibur . This is how the Gemma Knights defeated the evil power of Vandole . After much searching and adventuring , Sumo finds the rusty sword instead of Excalibur . Disappointed , he returns to Cibba in Lorim . He tells him that the only thing left to do is to reveal the Dime Tower in the Desert of Crystal . Sumo asked him how , and reply that the sword will help him . He should use it in the Cave of Ruins . Sumo is surprise to hear that the rusty sword had such great power . Cibba tells him that the legendary sword only shows its real power when it approves the wielder , stating that if he ' s a real Knight of Gemma . It will help him . After passing through the Dime Tower and the Temple of Mana , Sumo reaches the Mana Shrine . Sumo meets Fuji ' s Mother before facing Julius . She tells him that he has become a great Knight of Gemma , and transforms the rusty sword into Excalibur before disappearing . Sumo uses the Excalibur against Julius , and with it bring him down and peace returns to the world . Fuji decides to become the last Mana Tree , and Sumo ends up the last of the Gemma Knights , and his sole task is to protect the Mana Tree . Known Members . There are only three known members :