Mansion : The Memory of Sagiso Mansion : The Memory of Sagiso is the tenth episode of " " . Story Detail . Prologue . The episode opens with Ai , Chobi , Lisa , and Yu walking through what seems to be a deserted town . Yu quickly discovers that the houses are in fact just rocks , in the shape of houses . Spotting what appears to be their parents , Ai and Yu give case , running after them toward a large mansion at the top of a hill . The Mansion resident . The group cautiously enter the mansion , but like the town before it , it seems to be deserted . After venturing a short way in , a piano is heard in the distance , and Yu runs off to investigate . Finding a lone , white grand piano in a strange room , the group discover the " player " is really just drops of water falling from the ceiling , which is covered in roses . Realizing they are lost , the group begin to explore , trying to find an exit . They soon stumble on a cavern like room , with giant chili - peppers hanging from the roof . Chobi suddenly leaps up and devours an entire pepper , sending him into a energetic panic ; racing all over the room , and turning his feathers red . Chobi races off with Ai , causing Yu to chase after her . Just as Lisa is about to give chase , a small voice begs her not to leave . Following the sobs of the voice , she stumbles across a strange - looking boy . The boy begs Lisa to take him with her , but Lisa cannot reply , noting that it " doesn ' t feel human " , but she seems to remember it from somewhere . Ensnared . Yu , having lost Chobi and Ai , finds himself in a Venice - like street , still within the mansion . Spying the two from before crossing the waterway , he races after them . Elsewhere in the canal , Lisa and the small boy appear , searching for the others . The boy reveals her name to be Sagi , and what brought him here was a light of some kind . Meanwhile , Yu is revealed to have found his way into a strange field of giggling and licking sunflowers and Ai has been dumped by Chobi in front of a strange pod . The pod opens , releasing a swarm of butterflies which chase Ai . Lisa and Sagi have also located a similar pod . However , when this pod opens , a large bouncing ball chases the pair . Lisa lets go of Sagi to preform her Kigen . Sagi who has become sullen from the brief absence of Lisa , questions whether Lisa is going to leave him behind " again " . Lisa questions by asking if they have met before , to which Sagi response by claiming he remembers Lisa , despite Lisa not recalling Sagi . As she embraces Sagi , two of the bouncing balls from earlier reappear , but she does not have the time to fend them off . Elsewhere , Ai is shown to have fled into a strange room to escape the butterflies , but the tiles quickly slid up , depositing her into a dark chute of some kind . As Yu stops to rest at a landing in a flight of stairs , a third pod opens behind him , capturing him with a set of tentacles . The Land Lord . The group , minus Chobi , are deposited onto a round carpet in a large room , with a large flower at the center of it . Ai screams when she sees the flower has a face , to which Herba complains was very rude of her to scream when she sees her " Hughug " . At the moment one of the pods around the room opens , with Herba revealing they are searching for Omega . She quickly expresses her anger when a walking chair and desk appear , complaining that the pods are not doing a very good job . Just as Herba sets the Hughug on the group , Chobi appears and attacks Herba . However , he is effortlessly deflected and defeated by Herba . After Yu demands to know where their mother and father are , Herba calls to cactus - like men into the room , whom are wearing their parents ' backpacks . Herba refuses to reveal where the packs come from , setting the Hughug onto them once more . Just as Hughug and more cactus men are closing in on the group , one of the pods opens again . Emerging this time is Kaze , who quickly dispatches all the cactus men and the Hughug . Spotting Herba , Kaze quickly powers up the Magun and loads the weapon . Before Kaze is finished doing so , Herba flees and the cactus men begin running around and panicking . Kaze summons Atmos , which begins to suck the mansion and all its contents into its mouth . Sagi loses his grip of Lisa , but manages to grasp onto another ledge just out of arm ' s reach . He urges the group to feed Chobi a " Dead Pepper " ; one of the chilies from the room Lisa found her in . Pulling such a pepper from PoshePoket , the group sends Chobi into another wide rage . Just before he takes off , Lisa manages to grasp hold of Sagi , and with Chobi ' s new found energy , the group escape from the winds . Epilogue . After the winds die down , Lisa looks around , noting that the town , the mansion , Herba , and Kaze have all vanished . Checking over the group , she notices Sagi is missing , though neither Ai nor Yu recall seeing such a person . Casting around , trying to spot Sagi , Lisa notices a single flower in the hard soil ; a sagisou . It is then she recalls : When she was little , a sagisou grew near her house . She used to care for the flower , but had to move away some time after , leaving the flower behind . Realizing the Sagi was the spirit of the flower , she tries to apologize to the flower for not remembering her . The episode concludes with Ai and Yu discussing the signification of a sagisou . Soil . In this episode , only one combination of Soil is seen : The light that brings tears to all / The fury that levels everything to the ground - Storm Blue Absorbing all colors back where they came / The essence that erases all color - Acid Gray / Ash Gray Collapsing into an infinity darkness / The spirit that drops into infinite darkness - Silent Black This combination summons Atomos , a large creature that sucks a large amount of air and objects into its mouth , leveling an entire village in minutes .