Otherworlder

Otherworlder (異世界人), refers to individuals that come to the Central World from other worlds.

Summoned
Summoned (召喚者) are those that arrived through way of summoning rituals. It's a dangerous form of transportation, as the victim's body is exposed to massive amounts of magicules. Only those that bear a strong enough soul can withstand it.

There are very few forces capable of summoning Otherworlders because it's a taxing effort, especially to summon a person with powerful abilities. The necessary conditions for a proper summoning are as follows:


 * The success rate of the ritual with thirty magicians chanting summoning magic over a period of three days is less than 0.03%.
 * The ritual can't be performed after the last one for a set interval.
 * The cooldown period ranges from 33–88 years, the time during this period is used to prepare a suitable environment to increase the success rate of subsequent summonings.

However, if the ritual were to be conducted under less demanding conditions, it can be done continuously. But the downside of such summons, is that it usually results in children appearing with abundant magicules infused into them.

The rate of success for Summoned gaining a unique skill is relatively low, with a curse carved into their souls in the process. The rampaging magical energy inside their bodies will cause them to implode, fried alive by the very power they possess. The recorded lifespan of those improperly summoned without a unique skill is three years. Therefore, unless a unique skill is obtained, death is certain.

Leon Cromwell is to blame for spreading this knowledge to human nations in order to summon his friend Chloe Aubert, by exploiting the greedy humans by proxy. However, Leon quickly realized these illegal summonings will cease upon Rimuru ascending to Demon Lord status – humans will not risk Rimuru's wrath for kidnapping and enslaving youths from his world.

Stray
Stray (偶発的にやって来る異世界人) refer to Otherworlders transported by sheer accident. There is no clear cause or pattern known for why this happens, but in general, it's considered a one-way street and the phenomenon is not known to happen in reverse.

Among the three ways for Otherworlders to appear, this is a dangerous way to be transported in the initial stage, since there is no fixed target location. So it's possible to be suddenly transported into hostile lands. However, if that hurdle is cleared and the Stray manages to acclimate themselves to their new world, then the greatest danger has passed. Unlike Summoned, Strays are not subjected to enslavement and thus enjoy greater freedom, however, likewise there is no guarantee of obtaining a Unique Skill in turn, and in general, there is a chance for these kinds of Otherworlders to be comparatively weak, like in the case of Yoshida, however that too is not guaranteed either. For example, Hinata Sakaguchi obtained two Unique Skills despite being a Stray.

Reincarnated
Reincarnator (転生者) or Transmigrant refers to individuals that are reborn into other worlds. Being reincarnated tends to happen randomly. Although there are those among the reincarnated who still remember their past life, to have reincarnated from a different world is exceedingly rare. Moreover, one would normally be reincarnated as a human. However, there are very few exceptional cases. For someone to be reincarnated a monster, and from magical energy itself, is something that remains unheard of. The only known example of this is Rimuru Tempest.

Reincarnated

 * Rimuru Tempest
 * Agera
 * Venom
 * Mariabell Rosso

Strays

 * Hinata Sakaguchi
 * Kaoru Yoshida
 * Leon Cromwell
 * Masayuki Honjou
 * Tatsuya Kondou
 * Byakuya Araki
 * Bernie

Summoned

 * Shizue Izawa
 * Yuuki Kagurazaka
 * Chloe Aubert
 * Alice Rondo
 * Kenya Misaki
 * Gale Gibson
 * Ryota Sekiguchi
 * Folgen
 * Shogo Taguchi
 * Kyoya Tachibana
 * Kirara Mizutani
 * Glenda Attley
 * Shinji Tanimura
 * Mark Lauren
 * Zhen Liu Xing

pt-br:Viajante Mundial