Companion
Companion noun - A person frequently seen in the company of another.
Filler and companion are semantically related. In some cases you can use "Filler" instead a noun "Companion".
Nearby Words: companionable, companionship, companioned
Mutual synonyms
Both words in one sentence
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He's made two more appearances in the franchise; fittingly, one of them is in a filler episode of Sonic X that has no bearing on the rest of the series, while the other is his cameo as a companion in Sonic Runners.
Source: BLAM / Video Games - Comments: This is a very good take on the anime, having Serena be Ash's traveling companion (along with Leaf), cutting out a lot of the filler, making Ash smarter, having them catch Pokemon they didn't get in canon, having alternate takes on events, and generally having a better feel about it.
Source: Fanfic Recs / Pokémon General
Cite this Source
Filler and Companion. (2016). Retrieved 2026, August 08, from https://thesaurus.plus/related/companion/filler
Companion & Filler. N.p., 2016. Web. 08 Aug. 2026. <https://thesaurus.plus/related/companion/filler>.
Filler or Companion. 2016. Accessed August 08, 2026. https://thesaurus.plus/related/companion/filler.
Google Ngram Viewer shows how "companion" and "filler" have occurred on timeline