Ochu ( Final Fantasy XIII - 2 ) The Ochu is a boss enemy in the far western Clearwater Marshes area of the Archylte Steppe in ? ? ? AF ( year unknown ) , in " Final Fantasy XIII - 2 " . It is the first of four such bosses , and like the others , can be fought repeatedly by returning to the Steppes and resetting the weather . In preparation , the hunters must be appeased with tasks , and three Cactuar statues must be found and activated ; their summoned Gigantuars defeated . This allows the southern Time Gate which leads to the Vile Peaks - 200 AF - to be activated with a Wild Fragment . Back at the eastern Nomad Camp , Tipur , in the center of the camp , will then offer the task of hunting the Ochu . The weather must be changed to Rainy ( left lever up and right lever down ) for the Ochu to appear in the marshes ; the Ochu Fragment is acquired upon success . Each of the other three bosses : Long Gui , Immortal and Yomi also give fragment rewards , and Yomi is also prized as a means of making gil quickly . Datalog . " Ochus are wild plant - monsters that live on Gran Pulse . Variants include the small microchu and its close cousin the neochu , as well as the rapidly mutating chaochu . " " Because the ochu and its relatives inhabit similar environments , they are fierce rivals for food and resources . On Pulse , evolution acts on populations remarkably quickly ; new varieties and species emerge in a matter of years . That said , however , the ochu and neochu have been in competition for much longer . " Strategy . Because it has lower stats than its counterpart in " Final Fantasy XIII " , the player has a wider choice of strategies to beat it , depending on the party ' s level . Both defensive strategies and more offensive ones will use offensive paradigms such as Relentless Assault ( COM / RAV / RAV ) or Tri - Disaster ( RAV / RAV / RAV ) to kill their choice of the first target . The difference is that a more defensive stance will make Ochu the main priority since it will summon more Microchus with Seed Dispersal , while an offensive one will attempt to kill everything - first the Microchus , then the Ochu before he summons more of them . The vulnerability of both the Ochu and its minions to fire should be used as an advantage . As always , Potions and Remedies are very useful , as they take up no ATB segments to use , and can be used in any paradigm . Here they are almost mandatory as an adjunct to Medics ' healing , due to the Pollen and multiple damage sources . The Ochu will use Pollen if the Microchus are left around for long enough ; this will also befall the offensive party , should they fail to kill the Microchus quickly . When the player is alerted ahead of time that a boss will soon do an attacks that does a lot of damage to the whole party , much of the damage can be intercepted by momentarily switching to all Sentinels ( Tortoise ) ; the Sentinels do not have to have time to do anything - simply " being " a Sentinel will achieve the damage reduction . However , Pollen is cast with much less advance warning given to the player than , say , Atlas ' attacks give . Saboteurs ' debuffs will not be removed by the Ochu . Deprotect and Deshell have a good chance of landing , and Imperil less so . This is one of the keys to the offensive strategy , if raw power alone is not enough to take down the Ochu before it summons . The defensive strategy is more likely to make greater use of Sentinels in the early half of the fight , as it is not reducing incoming damage by removing the source , i . e . killing the Microchus . Combat Clinic ( MED / MED / SEN ) or Salvation ( all MEDs ) is probably the best shot at restoring HP , with the former being safer and more adaptable and the latter being more effective at healing , and giving a chance of rectifying mistakes . The Sentinel will draw the Microchu and Ochu while the two Medics concentrate on healing . Once stagger ed the player may change to Cerberus , Aggression or Tireless Charge . When it has finally been downed , the player can use Misdirection ( COM / MED / MED ) and take out the Microchu , but if feeling confident , Tireless Charge - W ( or X , depending on the player ' s damage preference ) can also be used . Both strategies may use Synergists , e . g . Protection ( MED / SYN / SEN ) to enhance protection and attacks , but this strategy is doomed to last for a limited time before a significant reversal , when the Ochus Screech attack removes all buffs from the party . A Synergist monster with Enfire will speed up buffing and can take advantage of the fact that Enfired Firestrike s will do Area of Effect damage . If this tactic is chosen , all paradigms with significant RAV presence should be set to - X ( narrow ) targeting to ensure AI RAVs choose Firestrikes more often .