I recently took on a second kitten, a 14 week old little boy kitten called Jasper who is as friendly and bouncy a bundle of kitten as you could imagine. Lily, my original kitten, is now 5 months and after some initial growling they are now largely getting on. There's one thing - he likes to jump on her head. She'll be chilling out dozing and he'll launch at her, jumping up and down on her and biting her feet. They'll have a little scuffle that seems mostly good natured, no howling or screaming, then he'll scamper off and do it again 5 minutes later.
Since he arrived Lily has become a bit more reserved, not as cuddly and affectionate as she was before he got here, and I do wonder if being constantly jumped on is getting her down. Is there any way I can discourage him from harassing her quite as much?

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Lily - silver Egyptian Mau
Jasper - Burmese X moggy - missing!
Electra - silver Egyptian Mau
(
Truffles - chocolate tortie syrian hammy - bye little one, I miss you)
And 6 little balls of silver spotty fluff! OMG KITTENZ etc