Back in the late 90s and early-2000s, Pokmon TCG was a hobby for children, primarily kids who were a fan of the Pokmon video games and anime
Ramos, Dragon Engine Ramoss defining strength is converting multicolor spells into massive bursts of mana , letting Dragon decks leap far ahead in a single turn
However, from a flavor/lore point of view, it's great
Kain is a good early play that can guarantee you the top-ups you need, and you can do some dastardly things with him, like building him tall and strapping a Vampiric Link to him to ensure you gain life off of anyone attacking with him
For a complete comparison of buying options, see our guide to buying Japanese Pokemon cards from Japan
Miku has done collaborations with other major IP like Pokmon, has several video games, and is in the middle of an IRL world tour where she performs on a screen