| Ranking / SR | Point / R |
| Seafaring Steam Train Guide Chris Koron | Guide To The Glistening Sea Kaoru Sakuraba |
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| Gacha / SR | Gacha / SR |
| Rail To The Glistening Sea Makio Uzuki | Together With My Sea Friends♪ Kanon Himeno |
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Let the Whistle Blow! Marine Train Live
From The iDOLM@STER: SideM Unofficial English Wiki
| #084: Let the Whistle Blow! Marine Train Live | ||
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[Produce] 03/01/2020 – 03/10/2020 | |
| Event Idols | ||
 
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Marine Train and Legend of Mermaid Gacha 02/29/2020 – 03/12/2020 | |
| Gacha Idols | ||
 
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Event and Gacha Banners   | ||
Featured Idols[edit | hide | hide all]
| Ranking / SR | Point / R |
| Seafaring Steam Train Guide Chris Koron | Guide To The Glistening Sea Kaoru Sakuraba |
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| Gacha / SR | Gacha / SR |
| Rail To The Glistening Sea Makio Uzuki | Together With My Sea Friends♪ Kanon Himeno |
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