To answer your question on Tonio being on other editors besides V2, he works on V3 and V4, but you need the import tool for it.
Here are some links:
AH-Software V2 trials to test V2 with your computer: Resource - All Official Vocal Synth trials (+ some references)
V2 Library Import Tool: VOCALOID2 Library Import Tool 2.0.1 Setup : YAMAHA : Free Download, Borrow, and Streaming : Internet Archive
V2 Import Codes (they have unlimited uses which is why they can be shared):
And I can confirm from personal experience that I have gotten Sonika working in the Tiny V3 Editor trial, the V4 Editor trial, and Piapro Studio V4x
Extra precaution that V4 is the last editor he works on, he does not work on V5
Here are some links:
AH-Software V2 trials to test V2 with your computer: Resource - All Official Vocal Synth trials (+ some references)
V2 Library Import Tool: VOCALOID2 Library Import Tool 2.0.1 Setup : YAMAHA : Free Download, Borrow, and Streaming : Internet Archive
V2 Import Codes (they have unlimited uses which is why they can be shared):
And I can confirm from personal experience that I have gotten Sonika working in the Tiny V3 Editor trial, the V4 Editor trial, and Piapro Studio V4x
Extra precaution that V4 is the last editor he works on, he does not work on V5