This second one is from Pixiv user "エレクトリカル観念" (https://www.pixiv.net/en/users/97821) who has a lot more SFW work, this gallery only contains their R-18 stuff though.

Lots of "Marth x Ness" again but now with some "Ike x Lucas" too, seems like an odd pairing but there must be something to it since multiple artists over there drew it a bunch in the 2010s, not really anymore strangely enough. Maybe they've moved somewhere other than Pixiv? If a bunch of artists DID move somewhere else away from Pixiv, I'd appreciate someone letting me know!

Not so much of a "media hunt" with this one, aside from some stuff that might be in their "My Pixiv" if I remember how that works correctly. But this one seems to have mostly stuck to uploading on Pixiv, no books or anything like that. They've got a Twitter.. or "X" now I suppose, but that didn't seem to have much in the way of art. Their last Pixiv upload was around 6 years ago so I guess they're done with that unless they've been posting somewhere else, not that I could find anything. Their last Twitter post was a repost of something from earlier this month so I'd assume they're alright even if they've quit drawing.